XM2010 Purchase Description_from M24E1 W15QKN-10-D-0504 SIGNED COMBINED.pdf

Comments, suggestions or questions on this document should be addressed to: U.S. Army ARDEC, ATTN: RDAR-QEW-C, Picatinny Arsenal, NJ 07806-5000, or emailed to vincent.barbato@us.army.mil.

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited

PURCHASE DESCRIPTION

RIFLE, .300 WINCHESTER MAGNUM, SNIPER

W/ DAY OPTICAL SIGHT AND

CARRYING CASES, M24 RECONFIGURED

1.0 SCOPE

1.1 Scope

1.2

. This specification covers the performance, characteristics, firing, packaging and quality assurance requirements for the Rifle, .300 Winchester Magnum, Sniper with day optical sight and carrying cases, M24 Reconfigured.

System components

1.3

. The reconfigured M24 system, hereafter referred to as M24, is comprised of a rifle, a detachable bipod, a detachable day optical sight and mounting interface with a carrying case, sound suppressor and thermal sleeve, detachable iron sights, sling, deployment kit, cleaning kit, five (5) detachable box magazines and a system carrying case for all of the components.

Requirement levels

1.4

. This specification identifies two values for certain requirements. The threshold value (T) is the minimum acceptable value and the objective value (O) is the desired value for which the performance of the reconfigured M24 results in an operationally significant increase in capabilities. All requirements not noted are threshold requirements.

Tailorability

Addendum 1

. Because of the variety of non-developmental hardware configurations currently available, this purchase description, where applicable, contains guide requirements and verification methods that may be tailored to conform to the physical configuration and/or manufacturing methodology presented by an offeror. It is the offeror’s responsibility to complete the guide requirements and verification methods addendum in this purchase description (see ) and submit the addendum with their proposal. Guide requirements and verification methods are designated in this purchase description by “(GUIDE)” after the applicable requirement or verification method title.

2.0 APPLICABLE DOCUMENTS

2.1 Government documents

2.1.1

Specifications, standards and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

SPECIFICATIONS

MILITARY

MIL-DTL-117 Bag, Sleeve and Tubing - Interior Packaging MIL-PRF-372 Cleaning Compound, Solvent MIL-C-675 Coating of Glass Optical Elements (Antireflection) MIL-A-8625 Anodic Coatings, for Aluminum and Aluminum Alloys MIL-PRF-13830 Optical Components for Fire Control Instruments, General

Specification Governing the Manufacture, Assembly and Inspection of

MIL-W-13855 Weapons: Small Arms and Aircraft Armament Subcomponents, General Specification for

MIL-PRF-14107 Lubricating Oil, Weapons, Low Temperature MIL-L-46000 Lubricant, Semi-Fluid (Automatic Weapons) MIL-C-46477 Cartridge, 7.62mm, NATO, Test, High Pressure, M60 MIL-C-46934 Cartridge, 7.62mm, NATO, Special Ball, M118 MIL-PRF-63460 Lubricant, Cleaner and Preservative for Weapons and Weapons

Components MIL-W-63150 Weapons and Support Materiel Standard Quality Assurance

Provisions for

STANDARDS

FEDERAL

FED-STD-595 Colors Used in Government Procurement

MILITARY

MIL-STD-109 Quality Assurance Terms and Definitions MIL-STD-129 Marking for Shipment and Storage MIL-STD-130M Identification Marking of US Military Property MIL-STD-171 Finishing of Metal and Wood Surface MIL-STD-810 Environmental Test Methods MIL-STD-1472 Human Engineering Design Criteria for Military Components, Equipment and Facilities MIL-STD-1474 Noise Limits for Army Materiel

HANDBOOKS

MIL-HDBK-759 Human Factors Engineering

(Unless otherwise indicated, Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or http://assist.daps.dla.mil from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

http://assist.daps.dla.mil/quicksearch/� http://assist.daps.dla.mil/�

2.1.2 Other Government documents, drawings, and publications

. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation.

DRAWINGS (See 6.6)

U.S. ARMY ARMAMENT, RESEARCH, DEVELOPMENT AND ENGINEERING

CENTER (ARDEC)

PRODUCT AND PACKING DRAWINGS

7141245 Sling, Leather, M1907 5564174 Brush, Cleaning, Cal .30

NATICK LAB DRAWING

D2-2-282 Cleaning Pouch

PUBLICATIONS

DEPARTMENT OF DEFENSE

TOP 3-2-609 Chemical Compatibility of Non-Metallic Materials

DEPARTMENT OF NAVY SPECIFICATIONS1

DS/4083/C03/1312 Detail Specification for Cartridge, Caliber .300 Winchester Magnum, Match Grade, MK 248 MOD 0, DODIC A191, NSN 1305-01-018-1547

DS/JXNN/C08/1604 Detail Specification for Cartridge, Caliber .300 Winchester Magnum, Match Grade, MK 248 MOD 1, DODIC AB43, NSN 1305-01-568-7504

(Unless otherwise indicated, Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or http://assist.daps.dla.mil from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

2.2 Non-government publications

. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

INTERNATIONAL ORGANIZATION FOR STANDARDIZATION

1 Contact procuring agency for a copy of Mk248 specifications http://assist.daps.dla.mil/quicksearch/� http://assist.daps.dla.mil/�

ISO 9000 Quality Management Components – Fundamentals and Vocabulary

SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)

AMS 2469 Hard Anodic Coating Treatment of Aluminum and Aluminum

Alloys Processing and Performance Requirements

(Copies of this document are available online at http://www.sae.org or from the Society of Automotive Engineers, 40 Commonwealth Drive, Warrendale, PA, 15096).

AMERICAN SOCIETY OF MECHANICAL ENGINEERS

ASME B46.1 Surface Texture (Surface Roughness, Waviness and Lay) ASME E 1444 Standard Practice for Magnetic Particle Testing ASME Y 14.24 Types and Applications of Engineering Drawing

(Copies of this document are available online at http://www.asme.org or from the American Society of Mechanical Engineers, Three Park Avenue, New York, NY 10016-5990 )

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM-B117 Standard Method of Salt Spray (Fog) Testing ASTM-D3951 Packaging, Commercial ASTM E308 Standard Practice for Computing the Colors of Objects by Using the CIE System.

(Copies of this document are available online at http://www.astm.org or from the American Society for Testing and Materials, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA, 19428-2959.)

AMERICAN NATIONAL STARDARDS INSTITUE

ANSI/SAAMI 2299.4 Voluntary Industry Performance Standards for Pressure and Velocity of Centerfire Rifle Sporting Ammunition for the Use of Commercial Manufacturers

(Copies of this document are available online at http://www.saami.org)

2.3 Order of precedence

. Unless otherwise specified in this document or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

http://www.sae.org/� http://www.asme.org/� http://www.astm.org/� http://www.saami.org/�

3.0 REQUIREMENTS

3.1 Design verification 6.2. When specified (see ), samples shall be subjected to design verification in accordance with Table I and 4.2.

3.2 First article inspection 6.2. Unless otherwise specified (see ), samples shall be subjected to first article inspection in accordance with Table I and 4.3.

3.3 Conformance inspection 6.2. Unless otherwise specified (see ), samples shall be subjected to quality conformance inspection in accordance with Table I and 4.4.

3.4 Materials and construction

3.5

. The M24 shall conform to the materials and construction requirements specified herein and be in accordance with the applicable materials and construction provisions of MIL-W-13855. Parts and surfaces subjected to rolling or sliding contact shall be of sufficient hardness to resist wear. Staked or dovetailed members shall have sufficient temper to retain their original fit after extended use. Screws, when firmly tightened, shall not cause binding of any of the mechanisms. External pins shall be secured in position by detent or retainer.

Design

3.6

. Unless otherwise specified in the contract, the M24 shall conform to the human factors provisions of MIL-STD-1472 and MIL-HDBK-759.

Machine finish 4.3

. Machine finishes shall be in accordance with commercial practice for the rifle, detachable iron sights and optical sight furnished. First article rifles (see ) and the aforementioned sighting components shall be used as standards for machine finishes for production items.

3.7 Soundness of weld

3.8

. All welds shall show good fusion. The weld and welded parts shall be free of cracks, porosity, inclusions and other metallic discontinuities.

Touchup material

3.9

. Exterior surfaces on metal components which are bright or without finish after assembly operations, such as the surfaces of rivets, pins, screw heads, staking marks and the like shall be refinished using materials and procedures in accordance with the touchup procedures of MIL-W-13855.

Human engineering characteristics

3.10

. In addition to meeting the design requirements specified herein, rifles, sighting systems and carrying cases shall meet with approval for human engineering characteristics in accordance with MIL-STD-1472 (Para 5.4 and 5.11).

Final protective finish

3.10.1

. All components of the M24 shall be protected with a durable corrosion resistant coating, or made from durable corrosion resistant materials, which are abrasion, impact and battlefield chemical resistant equal to or greater than phosphated steel or anodized aluminum. The materials and coatings used shall protect the M24 from corrosion in all environments and weather conditions, including marine, high humidity, rain and desert conditions.

Corrosion resistance. The exposed rifle, complete with day optical sight (with lenses covered) and two fully loaded magazines shall be capable of firing two magazines without stoppages after standard salt fog test exposure of 48 hours (T) 96 hours (O). The system carrying case shall show no functional damage, and all metallic repair parts and tools contained in the deployment/cleaning kits shall show no evidence of red rust after standard salt fog test exposure of 48 hours (T) 96 hours (O).

3.11 Chemical resistance

3.12

. All components of the M24, except for the interior of the carrying cases, and except for the adjustment knobs, lenses, and lens cover on the day optical sight, shall not be affected by petroleum, oil and lubricant products, insect repellants and other common battlefield compounds, listed in TOP 3-2-609. The interior of the system carrying case shall not be affected by LSA (MIL-L-46000), CLP (MIL-PRF-63460), LAW (MIL-PRF-14107) and RBC

(MIL-PRF-372).

NBC decontamination

3.13

. The M24, except for the interior of the carrying cases, shall be NBC decontamination survivable, as specified in AR 70-75, to the level of DECON survivability associated with current small arms systems.

Fungus resistance

3.14

. There shall be no detrimental effects, as specified in MILSTD-810E, Method 508.4 “FUNGUS”, on components of the M24 as a result of fungal growth.

Cleaning kit

3.15

. The rifle shall be supplied with cleaning tools which shall enable operator level cleaning and shall not cause scratches, burrs nor any other type of damage or wear detrimental to the rifle, rifle barrel or any other parts. Cleaning items shall be compatible with use of LSA (MIL-L-46000), CLP (MIL-PRF-63460), LAW (MIL-PRF-14107) and RBC (MIL- PRF-372). The cleaning kit shall be contained in a corrosion resistant case.

Deployment kit

3.16

. The contents of the deployment kit shall consist of replacement parts and tools required for maintenance of all operator level functions on the M24. Deployment kit components shall be contained in a case designed or configured to provide corrosion resistance to components stored within the case.

Workmanship

3.17

. Workmanship shall be in accordance with MIL-W-13855. Finished items and parts shall not exhibit poor material and processing such as seams, laps, laminations, cracks, visible steps, sharp edges, nicks, scratches, burrs, deformations and missing operations which may affect serviceability, functioning, operation, appearance or safety. Fins and other extraneous metal shall be removed from cast or forged parts. Hammering to shape, salvage operations (including repair by welding except that normal cosmetic welding of surface blemishes on forgings or castings prior to heat treatment shall be permissible, except on barrels) or other similar practices shall not be permitted without prior approval of the procuring activity.

Rifle

3.17.1

Weight

3.17.2

. The rifle shall weigh no more than 19 pounds (T), 17.5 pounds (O) when mounted with the day optical sight, sling swivels, sling, bipod, sound suppressor, and with a magazine fully loaded with MK 248 MOD 0 (DODIC A191, 190 grain) ammunition.

Length

3.17.3

. The total length of the rifle shall not be more than 54 inches (T), 51 inches (O) with the suppressor attached, stock unfolded and adjusted to the minimum length of pull.

Maintainability. The rifle shall be designed to allow the operator to perform necessary cleaning and maintenance using standard DOD lubricants/solvents, without the use of any tools other than the equipment in the cleaning kit and deployment kit (T). Parts and assemblies removed or disassembled for maintenance under field conditions shall be designed to prevent improper assembly (O). Captive hardware shall be used to prevent loss of reusable parts during disassembly and maintenance (O).

3.17.4 Magazine

3.17.5

. The magazine shall be a detachable box magazine with a minimum capacity of five rounds. The magazine, when inserted in the rifle, shall not protrude far enough to touch the ground when the rifle is placed on a flat surface with bipod legs extended at the shortest setting. The magazine shall be free of defects which may affect the functioning of either the magazine or the rifle. The magazine shall fall free of the rifle when the magazine release is actuated.

Bipod

3.17.6

. The rifle shall have a detachable bipod. The bipod shall have legs that are independently adjustable in length, and shall provide rigid support when firing from the prone position. When the adjustable legs are set at the minimum setting, the minimum distance measured from the bipod mounting surface to a line that intersects both foot pads (when extended) shall not exceed 7 inches. The bipod shall swivel about an axis parallel to the bore axis and shall utilize a swivel adjustment/retention interface that does not require the use of tools (e.g. pliers) to apply enough torque to the swivel mechanism to prevent the weapon from canting under its own weight when positioned on a level surface (O). The legs shall fold, allowing the weapon to be stored in the system case without removing the bipod. The bipod shall attach to the rifle with tools common to the deployment kit.

Sling swivels

3.17.7

. The rifle shall have sling swivels that pivot 360°. The rifle shall have at least two attachment points to accept sling swivels. One sling swivel attachment point shall be located on the buttstock. There shall be at least one other attachment point located on the fore stock, that is capable of accepting detachable sling swivels.

Sling 3.17.6

. The sling shall mount to the provided sling swivels without the use of tools (see ) and shall be made of a material not susceptible to fungus growth (T). The sling shall be designed with an adjustable armcuff with integrated attachment mechanism used to attached/detached the armcuff to/from the primary sling in less than 10 seconds by an operator (O). The sling design shall facilitate transition between operator use as a traditional sling, a hasty sling, or a cuff sling (O).

3.17.8 Exterior surface

. All components of the rifle shall have permanent nonreflective exterior surfaces. All visible exterior components shall be colored in accordance with one of the following camouflage colors defined in FED-STD-595. All visible exterior components shall be of the same color.

FED-STD-595 Camouflage Color Chip Number Black 37030 Tan 686A 33446 Sand 33303 Green 383 34094

3.17.9 Stock. The stock shall have an adjustable length of pull. Length of pull adjustments shall be continuous or incremental, with a maximum of 1/4 inch increments, over a minimum acceptable length of pull range of 12 to 14 inches. The stock shall have an adjustable comb that does not interfere with manual bolt operation at any of its settings. Comb adjustments shall be continuous or incremental, with a maximum of 1/8 inch increments, over a minimum acceptable comb adjustments range of one inch between minimum and maximum height settings.

Adjustment of the stock for length of pull and comb height, at ambient temperature, shall be accomplished within 3 minutes without the use of special tools. Special tools are tools not contained in the cleaning or deployment kit. The stock shall be adjustable at ambient, hot (145° ± 5°F) and cold (-50° ± 5°F). The stock shall be adjustable by a person dressed in cold weather environmental clothing (with the exception of the outer arctic mitten) and NBC clothing. The buttstock shall fold (pivot) 180 – 5 degrees relative to the unfolded position and shall have an integrated mechanism that retains the buttstock in both the folded and unfolded positions during a drop event (see 3.15.8 Drop test – rifle). The width of the rifle at any location shall not exceed 4 inches when the buttstock is folded. The buttstock shall be capable of being moved between the two positions without the need for tools (T). The buttstock shall be capable of being moved between the two positions by one hand (O). The buttstock shall not require the length of pull or comb height to be changed from the operator set positions in order to allow the buttstock to be folded. When folded, the buttstock shall capture the bolt handle when the bolt is in the closed position (O).

3.17.10 Stock surface

3.17.11

. The gripping surfaces of the forestock and stock shall have non-skid surface textures in accordance with MIL-STD-1472 (para 5.9.11.5.4).

Bolt assembly

3.17.12

. The bolt assembly shall be removable and replaceable within one minute without the use of any tools.

Safety

. The rifle shall have a safety device which shall be detented in both the "safe" and "fire" position and, when in the safe position, will prevent the weapon from firing. The shooter shall be able to verify the position of the safety by both sight and touch. It shall be movable between the safe and fire positions by the operator without moving his hands from the shooting position (prone, standing, kneeling, sitting). It shall remain in the position the operator sets it until it is manually changed. The safety shall provide tactile feedback during movement from one position to another. The safety shall require a force of between 2 to 10 pounds to operate. When being moved from one position to the other, the safety shall not be audibly detectable from a distance of 10 meters.

The safety shall perform all the above operations at ambient, hot (145° ± 5°F) and cold (-50° ± 5°F) and by a person dressed in cold weather environmental clothing (except for the outer arctic mitten) and NBC clothing.

3.17.13 Mounting interface - rifle

3.17.14

. The stock shall have an integrated MIL-STD-1913 rail oriented at the “top” or 12 o’clock position with numbered rail slots that has sufficient rail surface to allow for simultaneous mounting of the day optic sight and other accessories (MILES, AN/PEQ-2, “clip-on” night vision devices, BUIS, etc.) (T). The 12 o’clock rail shall be parallel to the bore but may have a declination to allow engaging of a target, located 1200 meters from and at the same elevation as the rifle, with the day optic scope using “dialed” elevation correction and the primary reticle cross hair (no hold) when firing MK 248 MOD 0 (DODIC A191, 190 grain) and MK 248 MOD 1 (DODIC AB43, 220 grain) in calm environmental conditions (i.e. negligible wind) (T). Additional MIL-STD-1913 rails shall be integrated in the forestock, parallel to the bore, located at positions other than 12 o’clock (O).

Suppressor

3.17.14.1

. The M24 shall incorporate an integrated acoustic, flash and blast suppressor.

Suppressor interface. The suppressor shall be configured to enable attachment and detachment by the operator by hand or with the tools common to the deployment kit. The suppressor shall interface with the rifle in a manner that does not require removal of the flash hider.

3.17.14.2 Suppressor dispersion

3.17.22

. The rifle, with the suppressor attached, shall meet targeting and accuracy requirements (see ).

3.17.14.3 Suppressor impact shift

4.5.14.22

. The suppressor, when attached to the rifle, shall shift the mean point of impact of rounds fired, relative to firing without the suppressor, by no greater than

1.15 inches (1 MOA, 0.29 milliradians) at a range of 100 meters. When removing and reattaching the suppressor, the mean point of impact of all shot groups fired with the suppressor attached shall fall within a 45 degree arc from an origin centered at the combined mean point of impact of all unsuppressed shots (see for verification method).

3.17.14.4 Noise

3.17.14.5

. The rifle, when firing MK 248 MOD 0 (DODIC A191, 190 grain) and MK 248 MOD 1 (DODIC AB43, 220 grain) ammunition with the sound suppressor attached, shall not exceed the impulse noise limits for single hearing protection (reference curve X, Figure 4-1, MIL-STD-1474).

Suppressor sleeve

3.17.15

. A removable sleeve designed to fit around the exterior of the suppressor shall be supplied with the system. The sleeve shall have thermal insulating properties sufficient enough to facilitate hand removal of the suppressor after firing 10 rounds (T), 20 rounds (O) in two minutes. The sleeve shall fit tight enough to prevent translational shifting of the sleeve relative to the suppressor by more than ¼ inch after firing 20 rounds.

Flash hider

3.17.16

. The rifle shall have a flash reduction device/flash hider affixed to the muzzle to reduce the amount of visible flash relative to when the flash hider is not attached to the barrel.

Chamber dimensions (GUIDE)

3.17.17

. The chamber shall conform to the chamber dimensions and tolerances as specified in ANSI/SAAMI 2299.4 for .300 Winchester Magnum Ammunition.

Headspace dimensions (GUIDE)

3.17.18

. The headspace dimension and tolerance shall conform to that specified in ANSI/SAAMI 2299.4 for .300 Winchester Magnum Ammunition

Trigger

3.17.19

. The rifle shall have a trigger which is configured to prevent adjustment at the operator level. The trigger pull force shall be a minimum of three (3) pounds and a maximum of five (5) pounds. The trigger shall demonstrate the ability to consistently retain the trigger pull force within ± 8 ounces after 2500 trigger pulls. The trigger shall return to its normal forward position immediately upon release after partial or complete trigger pull.

Functioning

3.18.11

. The rifle shall operate without malfunctions or unserviceable parts. After functioning, the day optical sight shall meet the cleanliness and optical quality requirement (see

). Unless otherwise specified, all ammunition used shall be MK 248 MOD 0 (DODIC A191, 190 grain) and MK 248 MOD 1 (DODIC AB43, 220 grain) in accordance with Department of Navy Specifications DS/4083/C03/1312 and DS/JXNN/C08/1604 respectively.

3.17.20 Endurance. The rifle and day optical sight shall withstand a 10,000 round endurance test. The rifle shall be capable of firing 10,000 rounds without the receiver requiring overhaul.

The receiver shall be free of cracks. Cracks shall be defined as cracks that are detected by magnetic particle inspection with the unaided eye.

The rifle shall have a barrel which meets targeting and accuracy requirements (see 3.17.22) and is free of cracks for a minimum of 2,000 rounds.

The rifle and day optical sight shall meet reliability requirements (see 3.17.20.1).

3.17.20.1 Reliability

3.17.20.2

. The mean round between stoppage (MRBS) for the rifle shall be 1200 rounds. The mean round between essential function failure (MRBEFF) for the rifle and day optical sight shall be 2600 rounds.

Aim point retention

3.17.21

. The day optical sight shall have a maximum change in the zero of no greater than 0.5 minutes of angle after firing 200 rounds.

High-pressure resistance

3.17.22

. The rifle shall withstand the proof firing of one proof cartridge. Cartridges shall produce proof pressures derived from service load standard deviations as specified in ANSI/SAAMI 2299.4 using MK 248 MOD 1 (DODIC AB43, 220 grain) ammunition as the service load. Parts shall be free of cracks after proof firing as evidenced by visual and magnetic particle inspection. As a minimum, the barrel, bolt and receiver shall be inspected by magnetic particle.

Targeting and accuracy

3.17.23

. The rifle shall achieve the dispersion set forth below when fired from a machine rest. The average mean diameter of shot groups fired with and without the sound suppressor attached shall be less than or equal to 1.15 inches at 100 meters (1 MOA) (T),

0.92 inches at 100 meters (0.8 MOA) (O). The minimum rate of fire for conducting this test shall be three rounds per minute.

Drop survivability - rifle

3.17.22

. The rifle with day optic scope detached, with the safety in the safe position and an empty primed .300 Winchester Magnum cartridge in the chamber, shall withstand a five foot drop onto dirt. The primed cartridge shall not discharge. There shall be no functional damage to the rifle. After re-zeroing, the rifle shall meet the targeting and accuracy requirement (see ).

3.17.24 Firing pin (GUIDE)

3.17.20.1

. The firing pin shall deliver enough energy to reliably (see ) ignite MK 248 MOD 0 (DODIC A191, 190 grain) and MK 248 MOD 1 (DODIC

AB43, 220 grain) primers. The firing pin design and operation shall not contribute to primer malfunctions that can be related to excessive deformation of the primer (e.g. pierced primers, loose primers, escape of gas around the primer cup, etc.)

3.17.25 Temperature extremes

3.17.25.1

. The rifle with day optical sight shall be operable and safely functionable at hot (145° ± 5°F) and cold (-50° ± 5°F) temperatures.

Cold temperature functioning

3.17.25.2

. The rifle shall be capable of firing 300 rounds at cold temperature (-50° ± 5°F) with the occurrence of a total of no more than 18 stoppages and parts failures. The rifle shall be operable by the shooter dressed in cold weather environmental clothing (except for the outer arctic mitten) at the cold temperature.

Hot temperature functioning

3.17.26

. The rifle shall be capable of firing 300 rounds at hot temperature (145° ± 5°F) with the occurrence of a total of no more than 18 stoppages and parts failures.

Special clothing

3.17.27

. The rifle with day-optical sight shall be operable and maintainable by the shooter when dressed in NBC clothing.

Interchangeability

3.17.28

. All operator level repair parts that are field serviceable shall be interchangeable.

Muzzle velocity.

3.17.29

The barrel shall be of sufficient length to create muzzle velocity of not less than 2865 feet per second at ambient temperature when firing MK 248 MOD 0 (DODIC A191, 190 grain) ammunition.

Iron sights (O) 3.17.13

. The rifle shall be equipped with detachable iron sights. The iron sights shall be configured with an interface to mount to the MIL-STD-1913 rail (see ). The iron sights when attached and not in-use shall not interfere with the mounting and/or employment of the rifle’s primary optics/electro-optics.

3.17.29.1 Range

3.17.29.2

. The iron sights shall be capable of engaging targets to 600 meters (T), 800 meters (O).

Detachability

3.17.29.3

. The iron sights shall allow for replacement by trained personnel with tools common to the deployment kit. When reattached, the iron sights shall have a change in zero of no more than 1 MOA.

Adjustability

3.18

. The iron sights shall be adjustable for both elevation and azimuth in increments no greater than 0.5 MOA increments.

Day optical sight (DOS)

3.18.1

DOS mounting interface 3.17.13

. The day optical sight shall be equipped with a mounting system (e.g. rings and/or base interface) compatible with the MIL-STD-1913 rail (see ). The day optical sight mounting system shall be easily attached/detached to the rifle by the operator by hand and or with the tools common to the deployment kit.

3.18.2 Magnification. The magnification shall be continuously variable from 3.5 – 6.5X minimum to 16 – 25X maximum.

Rationale: without the requirement for continuously variable magnification, an offeror may propose optics with only two discrete power settings (narrow and wide field) using a throw lever.

3.18.3 Ballistic adjustments

3.18.3.1

Elevation and windage adjustment

3.18.3.1.1

. Adjustment for elevation and windage shall be knobs which have clearly marked graduations and tactile clicks with an increment, in target space, of 0.1 milliradians (20 seconds of arc). The initial zero position of optical axis shall not move more than 0.16 milliradians (33 seconds of arc), in target space, when each adjustment knob is cycled from 0 to the extreme adjustments and returned, for 10 cycles. The elevation and windage adjustments shall meet the above requirements at ambient temperature.

Adjustment Range

3.18.3.1.2

. The DOS shall provide for at least 20 milliradians (mr) in elevation (T). The elevation turrets shall exhibit a performance that allows the operator to achieve elevation needs within two turns (20 mr) (T). The DOS shall have a turn indicator that is both visible and tactile to easily determine which turn the DOS elevation adjustment is on without returning to zero stop (O).

Adjustable Zero Stop

3.18.3.2

. The DOS shall be capable of having an adjustable zero stop on the elevation turret (O).

Bullet drop compensation (BDC)

3.18.3.2.1

MK 248 MOD 0 BDC elevation dial

3.18.3.2.2

. The primary elevation dial shall incorporate BDC markings at 100 meter increments from 100 meters to a minimum of 1,000 meters which are optimized for MK 248 MOD 0 (DODIC A191, 190 grain) ammunition. The MK 248 MOD 0 BDC elevation dial shall be installed on the optic. The dial shall be marked “MK 248 MOD 0

BDC - METERS.”

MK 248 MOD 1 BDC elevation dial

. An elevation dial that incorporates BDC markings at 100 meter increments from 100 meters to a minimum of 1,000 meters which are optimized for MK 248 MOD 1 (DODIC AB43, 220 grain) ammunition. The MK 248 MOD 1 BDC elevation dial shall be included in the deployment kit. The dial shall be marked “MK 248

MOD 1 BDC - METERS.”

Comment: Barrel twist, length, and muzzle velocity is contingent upon the offeror's submitted weapon configuration(s). Weapon configuration, twist, length, muzzle velocity, etc should be discussed with the submitting weapon manufacturer.

For bid sample submissions, BCs for Mk248 projectiles can be obtained directly from Sierra.

The projectile for the MK 248 MOD 1 is the 190 grain Sierra MatchKing® HPBT bullet, commercial part number 2210, manufactured by Sierra Bullets

The projectile for the MK 248 MOD 1 is the 220 grain Sierra MatchKing® HPBT bullet, commercial part number 2240, manufactured by Sierra Bullets

Empirical external ballistic data will be collected during Government testing post contract award and the Government will work the prime contractor to facilitate modifications to BDC turret markings if necessary.

3.18.4 Reticle

. The day optical scope shall maintain a constant target/reticle aspect ratio throughout its entire magnification range. The reticle shall use a milliradian scale to facilitate rapid target ranging and engagement. The reticle shall be composed of a ranging stadia and a targeting stadia with no greater than 0.5 milliradian (103 arc seconds) mark spacing on both elevation and windage. The targeting stadia shall be configured to facilitate the use of operator “holds” for simultaneous bullet drop and windage correction.

Rationale: Requiring the reticle to be in the first focal plane of a zoom component may not assure that the reticle and target will change dimensions at a constant rate. Stating the requirement as a constant ratio leaves no confusion.

3.18.4.1 Cover plate (O)

3.18.4.2

. The reticle shall be a two piece cemented type consisting of a reticle and a cover plate. The cover plate shall have a thickness of 0.225 cm to .325 cm.

Index match & scale (O)

3.18.5

. The cover glass and reticle glass shall be from the same glass melt. The index of refraction of the cement used shall match the indices of the glass within ±

0.001. External surfaces shall have a surface quality of 20-10 or better. The back surface (air to glass) of the reticle and the air to glass surface of the cover glass shall have an anti-reflection coating PER MIL-C-675. The surface quality at the reticle surface of both pieces shall be 10-5.

Optical Glass

. All optical elements shall be per MIL-PRF-13830. Glass containing Thorium, or its compounds, shall not be used in the manufacture of the day optical scope. All glass elements shall be anti-reflection coated meeting minimum requirements of MIL-C-675.

Rationale: anti-reflection coated military grade glass is recommended for all military applications. For safety considerations, radioactive glass (thorium) should not be used.

3.18.6 Parallax

. The focus parallax between the center of the reticle and image of a target from 100 to 1500 meters range, inclusive, shall not exceed 0.073 milliradians (15 seconds of arc).

Rationale: specifying this large parallax free focusing range dictates the use of an adjustable parallax focus setting.

3.18.7 Eyepiece focus

3.18.7.1

. The eyepiece shall be easily adjustable and provide at least plus 1 diopters to minus 2 diopters from the position of best focus on the reticle surface.

Eyepiece and zoom torque

. The eyepiece and zoom torque values shall be between 3.46 to 25.3 kg-cm (3 to 22 in-lb) at each of the following temperatures: room temperature: minus 50 +/- 5 degrees F and; plus 145 +/- 5 degrees F.

Rationale. The eyepiece zoom mechanism can bind at low temperature. This problem has occurred in our fielded optics. This requirement will eliminate the issue. A change in the lubricant may only be needed to meet this requirement.

3.18.8 Resolution

3.18.9

. At the highest magnification setting, resolution shall be less than 4.5 arc seconds using a 4-6X diopometer. Vertical and horizontal lines shall be resolvable to within 0.5 diopters.

Laser filter unit (LFU) interface (GUIDE). The DOS objective housing shall have an internally threaded interface to allow for attachment of an LFU. The LFU shall be furnished by the Government upon final selection of the DOS.

Rationale. Requiring a 50mm LFU already in Government inventory limits DOS competition by requiring the objective lens to be 50mm for best optimization without use of an adapter. Some manufactures use 56mm objective lenses resulting in unnecessary light loss to adapt to the 50mm LFU’s smaller aperture. The Government will first acquire the scope and then, if necessary, create a new LFU or mounting adapter to fit this scope.

3.18.10 Clear eye distance (CED)

3.18.11

. The CED shall be greater than 86 millimeters when measured from the last surface of the eyepiece housing to the exit pupil.

Cleanliness and optical quality

3.18.12

. There shall be no evidence of glass, fracture, cement separation, grease or fingerprints on any optical component when viewing through the objective or eyepiece end of the sight unit. There shall not be more than 3 particles of foreign matter visible on the reticle surface and no particle shall exceed the apparent width of a reticle line.

There shall be no foreign matter obvious to the unaided eye which would impair optical performance when looking into the eyepiece against a background having a brightness of the sky in average daylight.

Watertightness

3.18.13

. The day optical sight shall show no evidence of leakage when submerged in water to a minimum depth of 3.28 feet (one meter) for a one hour period. No moisture or fogging shall be observed.

Sealing

3.18.14

. All internal optical areas of the day optical sight shall be purged with dry nitrogen. The sight unit shall be sealed such that the interior is moisture-free after purging. The sight shall remain sealed when subjected to a maximum pressure of negative (-) 5.4 pounds per square inch gage for eight hours.

Exterior surface

3.18.15

. All components of the day optical sight except the lenses, shall have a permanent non-reflective exterior surface.

Reattachment

3.18.16

. The day optical sight shall be capable of being removed and replaced on the rifle using only the tools contained in the deployment and cleaning kits (T) or without tools (O). The day optical sight shall be capable of being removed from the rifle and reattached for a minimum of 180 cycles with a maximum change in the zero of no greater than 1/2 minute of angle (T).

Drop survivability - day optical sight with carrying case

3.18.17

. The day optical sight, while inside the day optical sight carrying case shall withstand a drop test from a height of seven feet onto a one inch thick steel plate backed by concrete. The drop test shall be conducted at hot (145° ± 5°F) and cold (-50° ± 5°F). There shall be no structural damage to the carrying case which may result in damage to the contents during subsequent shipping, handling, or storage.

There shall be no affect on the optical properties or functional damage to the day optical sight.

Drop survivability - day optical sight

3.18.18

. The day optical sight shall withstand a two foot drop onto dirt. The dirt shall have a minimum soil penetration resistance of 750 pounds per square inch at a depth between 1 and 1½ inches. The day optical sight shall still meet all the optical requirements. There shall be no functional damage to the day optical sight.

Lens cover. The day optical sight shall have covers that protect the lenses from sunlight, debris and dust. These covers shall be securely fastened to the day optical sight, shall be capable of being opened while remaining attached to the sight and shall remain open during use.

3.19 System carrying case

3.19.1

. The system carrying case shall have provisions to securely contain and protect the following: rifle with day optical sight mounted on the rifle; bipod; suppressor; the day optical sight carrying case; the rifle cleaning kit; five (5) 5 round detachable box magazines and the deployment kit. The detachable iron sights shall be enclosed in the day optical sight carrying case.

Drop survivability

3.19.2

. The system carrying case and its full contents shall withstand a 30 inch drop test onto a one inch steel plate backed by concrete. The drop test shall be conducted at hot (145° ± 5°F) and cold (-50° ± 5°F) temperature. The system carrying case shall not open.

There shall be no structural damage to the system carrying case which may result in damage to the contents during subsequent shipping, handling or storage. There shall be no functional or physical damage to its contents.

Transportation vibration

3.19.3

. The system carrying case shall protect its full contents from transportation vibration. There shall be no functional or physical damage to the system carrying case or its contents.

Rain/moisture

3.19.4

. The system carrying case shall keep its full contents dry when subjected to rain falling at a rate of at least 0.03 inches/minute with a crosswind of 60 feet/second.

Pressure retention

3.20

. The system carrying case shall be capable of maintaining an internal positive pressure of 0.50 ± 0.05 psig (13.8 ± 1.4 in. of water) for 6 minutes with no more than a 15 percent drop from the initial reading.

Marking

3.20.1

. The rifle receiver shall keep the originally assigned serial number and the suppressor shall be marked and serial number assigned in accordance with MIL-W-13855. Each rifle and suppressor shall be marked as specified below.

Sample hardware

. Sample hardware supplied by the offeror for evaluation shall be identified by a unique serial number on the receiver and the sound suppressor assigned through the contractor's serialization series and the following:

(1) Manufacturer's name

(2) Manufacturer’s model number/nomenclature

(3) Caliber of the weapon

A mark shall be stamped on the barrel indicating successful passing of the high pressure resistance test.

3.20.2 Contract production items

. The rifle receiver, supplied as government furnished material, shall keep the originally assigned serial number and the suppressor shall be marked and serial number assigned in accordance with MIL-W-13855. The weapon and suppressor shall be marked with the following information:

(1) Manufacturer's name

(2) M24E1 SWS

(3) Caliber of the weapon

A mark shall be stamped on the barrel indicating successful passing of the high pressure resistance test.

3.20.3 Unique Identification Markings. Apply Unique Identification (UID) 2D Data Matrix mark in accordance with MILSTD-130M, construct #2, on the receiver and on the sound suppressor. The UID mark shall contain the manufacturer's cage code, weapon part number and serial number (data identifiers "17V”, "1P", and "S"). The 2D Data Matrix symbol shall be error correction code (ECC 200) in accordance with ISO 16022, using ISO 15434 syntax and the semantics of ISO 15418. UID label shall be durable and shall be capable of surviving sound suppressor temperatures.2

Other marking methods may be used with prior approval of the US Army Armament, Research, Development and Engineering Agency.

2 Aluminum based labels applied with high temperature adhesive have been acceptable with existing small arms systems.

4.0 VERIFICATION

TABLE I.

Requirement/verification cross-reference matrix

Requirement Description

Section 3 Requirements

Inspection sample size and criteria

Verification Methods

Section 4 Verification Procedures

Design Verification

(Govt.

Tested)

First Article

(Contractor Tested)

First Article (Govt.

Tested)

Conformance Inspection (One lot)

Design verification 3.1 X 4.2 First article inspection 3.2 X 4.3 Conformance inspection 3.3 X 4.4 Materials and construction 3.4 5-0-13 5-0-1 VL II4 Test 4.5.1 Design 3.5 5-0-1 Examination 4.5.2 Machine finish 3.6 5-0-1 5-0-1 VL II Test 4 4.5.3 Soundness of weld 3.7 5-0-1 5-0-1 Test 4.5.4 Touchup material 3.8 5-0-1 5-0-1 VL II Examination 4 4.5.5 Human engineering characteristics 3.9 5-0-1 Examination 4.5.6

Final protective finish 3.10 5-0-1 5-0-1 VL II Examination 4 4.5.7 Corrosion resistance 3.10.1 1-0-1 1-0-1 Test 4.5.7.1 Chemical resistance 3.11 1-0-1 Test 4.5.8 NBC decontamination 3.12 See 4.5.9 Analysis 4.5.9 Fungus resistance 3.13 1-0-1 Test 4.5.10 Cleaning kit 3.14 5-0-1 5-0-1 VL II Examination 4 4.5.11 Deployment kit 3.15 5-0-1 5-0-1 VL II Examination 4 4.5.12 Workmanship 3.16 10-0-1 100% 4 100%5 Examination 4.5.13 Weight 3.17.1 5-0-1 5-0-1 Examination 4.5.14.1 Length 3.17.2 5-0-1 5-0-1 Examination 4.5.14.2 Maintainability 3.17.3 3-0-1 Demonstration 4.5.14.3 Magazine 3.17.4 5-0-1 Demonstration 4.5.14.4 Bipod 3.17.5 5-0-1 Demonstration 4.5.14.5 Sling swivels 3.17.6 10-0-1 Examination 4.5.14.6 Sling 3.17.7 5-0-1 Demonstration 4.5.14.7 Exterior surface 3.17.8 5-0-1 5-0-1 Test 4.5.14.8 Stock 3.17.9 5-0-1 5-0-1 Examination 4.5.14.9 Stock surface 3.17.10 5-0-1 5-0-1 Examination 4.5.14.10 Bolt assembly 3.17.11 5-0-1 5-0-1 Demonstration 4.5.14.11

Safety 3.17.12 5-0-1 5-0-1 VL II Demonstration & Examination 4.5.14.12

Mounting interface - rifle 3.17.13 5-0-1 Examination 4.5.14.13 Suppressor interface 3.17.14.1 3-0-1 5-0-1 Demonstration 4.5.14.14.1 Suppressor dispersion 3.17.14.2 5-0-1 5-0-1 100% Test 5 4.5.14.14.2 Suppressor impact shift 3.17.14.3 5-0-1 5-0-1 100% Test 5 4.5.14.14.3

3 Common nomenclature throughout Table I (sample size – accept –reject); Test five (5) - Accept with zero (0) failures - Reject with one (1) failure 4 Failure to meet the requirement will be cause for rejection of the lot of rifles, day optical sights, or carrying cases 5 Failure to meet the requirement will be cause for rejection of the individual rifle, day optical sight, or carrying case

Description

Section 3 Requirements

Inspection sample size and criteria

Verification Methods

Section 4 Verification Procedures

Design Verification

(Govt.

Tested)

First Article

(Contractor Tested)

First Article (Govt.

Tested)

Conformance Inspection (One lot)

Noise 3.17.14.4 3-0-1 3-0-1 Test 4.5.14.14.4 Suppressor sleeve 3.17.14.5 3-0-1 3-0-1 Demonstration 4.5.14.14.5 Flash hider 3.17.15 3-0-1 3-0-1 Test 4.5.14.15 Chamber dimensions 3.17.16 10-0-1 10-0-1 VL II Examination 4 4.5.14.16 Headspace dimensions 3.17.17 10-0-1 10-0-1 VL II Examination 4 4.5.14.17 Trigger pull force 3.17.18 10-0-1 100% 4 100% Examination 5 4.5.14.18.1 Trigger pull force retainability 3.17.18 10-0-1 10-0-1 VL II Test 4 4.5.14.18.2

Functioning 3.17.19 5-0-1 5-0-1 100% Test 5 4.5.14.19 Endurance 3.17.20 3-0-1 3-0-1 Test 4.5.14.20 High-pressure resistance 3.17.21 5-0-1 100% 4 100% Test 5 4.5.14.21 Targeting and accuracy 3.17.22 5-0-1 5-0-1 100% Test 5 4.5.14.22 Drop survivability – rifle 3.17.23 1-0-1 1-0-1 Test 4.5.14.23 Firing pin 3.17.24 5-0-1 5-0-1 VL II Examination 4 4.5.14.24 Temperature extremes 3.17.25 3-0-1 3-0-1 Test 4.5.14.25 Special clothing 3.17.26 2-0-1 2-0-1 Demonstration 4.5.14.26 Interchangeability 3.17.27 3-0-1 3-0-1 Test 4.5.14.27 Muzzle velocity 3.17.28 3-0-1 3-0-1 Test 4.5.14.28 Iron sights 3.17.29 3-0-1 3-0-1 Demonstration 4.5.14.29

Range – iron sights 3.17.29.1 See

4.5.14.29.1 Analysis 4.5.14.29.1

Detachability – iron sights 3.17.29.2 5-0-1 5-0-1 VL I Test 4 4.5.14.29.2 Adjustability 3.17.29.3 5-0-1 5-0-1 VL I Demonstration 4 4.5.14.29.3 DOS mounting interface 3.18.1 3-0-1 3-0-1 Demonstration 4.5.15.1 Magnification 3.18.2 10-0-1 5-0-1 Examination 4.5.15.2 Elevation and windage adjustment 3.18.3.1 5-0-1 5-0-1 Demonstration 4.5.15.3.1

Bullet drop compensation 3.18.3.2 See

4.5.15.3.2 Analysis 4.5.15.3.2

Reticle 3.18.4 10-0-1 5-0-1 Examination 4.5.15.4 Cover plate 3.18.4.1 5-0-1 5-0-1 Examination 4.5.15.4.1 Index match & scale 3.18.4.2 5-0-1 5-0-1 Examination 4.5.15.4.2 Optical glass 3.18.5 10-0-1 5-0-1 Examination 4.5.15.5 Parallax 3.18.6 5-0-1 5-0-1 Examination 4.5.15.6 Eye piece focus 3.18.7 5-0-1 5-0-1 Examination 4.5.15.7 Eyepiece and zoom torque 3.18.7.1 5-0-1 5-0-1 Examination 4.5.15.7.1 Resolution 3.18.8 5-0-1 5-0-1 Examination 4.5.15.8 Laser filter unit interface 3.18.9 5-0-1 5-0-1 Examination 4.5.15.9 Clear eye distance 3.18.10 5-0-1 5-0-1 Examination 4.5.15.10 Cleanliness and optical quality 3.18.11 5-0-1 5-0-1 Examination 4.5.15.11

Watertightness 3.18.12 5-0-1 5-0-1 Test 4.5.15.12 Sealing 3.18.13 5-0-1 5-0-1 Test 4.5.15.13 Exterior surface 3.18.14 5-0-1 5-0-1 Examination 4.5.15.14 Reattachment 3.18.15 5-0-1 5-0-1 Test 4.5.15.15 Drop survivability – DOS 3.18.16 2-0-1 2-0-1 Test 4.5.15.16

Description

Section 3 Requirements

Inspection sample size and criteria

Verification Methods

Section 4 Verification Procedures

Design Verification

(Govt.

Tested)

First Article

(Contractor Tested)

First Article (Govt.

Tested)

Conformance Inspection (One lot) w/ case Drop survivability – DOS 3.18.17 3-0-1 3-0-1 Test 4.5.15.17 Lens cover 3.18.18 3-0-1 3-0-1 Examination 4.5.15.18 System carrying case 3.19 5-0-1 5-0-1 VL II Examination 4 4.5.16 Drop survivability – system case 3.19.1 2-0-1 2-0-1 Test 4.5.16.1

Transportation vibration 3.19.2 2-0-1 2-0-1 Test 4.5.16.2 Rain/moisture 3.19.3 2-0-1 2-0-1 Test 4.5.16.3 Pressure retention 3.19.4 3-0-1 3-0-1 Test 4.5.16.4 Marking 3.20 5-0-1 100% 4 100% Examination 5 4.5.16.5

4.1 Classification of inspections

. The following type of inspection shall apply:

a. Design verification (4.2).

b. First article inspection (4.3).

c. Conformance inspection (4.4).

4.2 Design verification 6.2. When specified (see ), design verification samples shall be subjected to design verification in accordance with Table I. All design verification tests shall be performed by the Government.

4.2.1 Design verification test rejection

4.3

. If any sample fails to comply with the design verification requirements, the design shall be rejected.

First article inspection 6.2

. The first article samples shall be representative of production processes to be used during quantity production. When specified (see ), the first article shall be subjected to first article inspection in accordance with Table I.

4.3.1 First article rejection

4.3.2

. If any M24 fails to comply with any of the applicable requirements, the first article sample shall be rejected.

First article submission

4.4

. The contractor shall submit a first article sample consisting of 19 M24's.

Conformance inspection Table I

. When specified (see 6.2), samples shall be subjected to conformance inspection in accordance with . Verification Levels (VL) shall be in accordance with MIL-STD-1916.

4.4.1 Inspection lot formation

4.4.2

. Unless otherwise specified, lot formation shall be in accordance with MIL-STD-1916.

Lot size

4.4.3

. The lot size shall be one (1) delivery order.

Lot identification

4.4.4

. Each inspection lot shall be identified with a lot number. The reason for rejection of any inspection lot shall be recorded. When a rejection inspection lot is resubmitted after reconditioning, it shall be identified as such.

Conformance inspection rejection

4.5

. Failure to meet any of the requirements shall be cause for rejection of the lot.

Methods of inspection

4.5.1

Materials and construction

4.5.2

. The verification of the material composition, material properties and construction related requirements shall be performed as specified in the specifications, standards and other documents referenced on the manufacturer’s product drawings.