Attachment_0008_-_General_Specification_for_Non_Standard_Mortar_Systems.pdf

30 June 2016

NON-STANDARD SPECIFICATION

FOR MORTAR SYSTEMS

1. SCOPE

This specification describes the performance requirements and identifies the verification procedures for the Non Standard Mortar systems. This specification supports the acquisition of a smooth bore mortar system consisting of a Barrel, Sighting Device, Base plate and Bipod. This specification includes the minimum essential Engineering and Packaging Requirements and the necessary Quality Assurance Provisions to determine that these requirements have been met.

2. APPLICABLE DOCUMENTS AND DEFINITIONS

Order of precedence, 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.

2.1 Documents

INTERNATIONAL TEST OPERATING PROCEDURES DOCUMENTS

ITOP 4-2-805 Projectile Velocity and Time of Flight Measurements, 20 September 2005.

ITOP 3-2-810 Weapon Chamber Pressure Measurements, 18 December 1985.

ITOP 3-2-803 Visual Inspection of Cannon Bores, 1 October 1992.

ITOP 3-2-815 Recoil Motion Measurement, 11 October 1996.

ITOP 4-2-826 Solar Radiation Tests, 21 September 1983.

ITOP 7-2-509(1) Airdrop, 27 May 1994.

SOCIETY OF AUTOMOTIVE ENGINEERS DOCUMENTS

SAE AS9102 Aerospace First Article Inspection Requirements

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

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INTERNATIONAL ORGANIZATION FOR STANDARDIZATION DOCUMENTS

ISO 3452-4 Non-Destructive Testing - Penetrate Testing - Part 4: Equipment - First

Edition; Together with ISO 3452-1, ISO 3452-2 and ISO 3452-3 Cancels and Replaces

ISO 3452:1984

ISO DIS 9934-1 Non-destructive testing - Magnetic particle testing - Part 1: General principles

INTERNATIONAL STANDARDS FOR PHYTOSANITARY MEASURES DOCUMENTS

ISPM-15 International Standards For Phytosanitary Measures No. 15

2.2 Definitions

Maximum Operating Pressure (MOP): Where the Extreme Service Condition Pressure ESCP

(population mean) and the corresponding pressure standard deviation (populations) are known then MOP is the ESCP plus three standard deviations estimated during the cannon design phase.

The MOP may be equal to but not greater than System Permissible Maximum Pressure.

System Permissible Maximum Pressure (PMP): The Permissible Maximum (PMP) is a service pressure which should not be exceeded statistically more than 13 times over the course of 10,000 extreme service condition rounds. The System PMP derived either the pressure of cannon PMP or projectile PMP whichever is the lower for a specified system.

System Design Pressure (DP): The design pressure is the pressure for which the test item was designed for, including safety factor. The System DP is equal to the Cannon DP or Projectile

DP, whichever is the lower for a specified system.

Extreme Service Condition Pressure (ESCP): Is the mean chamber pressure developed when firing the specified system at the maximum temperature extreme with the addition of the pressure variances that have been recorded to due to tube to tube, occasion to occasion, and propellant lot to lot, differences.

Mil: For this document, the NATO mil will be used. The NATO mil is defined as an angle comprising 1/6400th of a circle, equal to 0.05625 degrees.

http://specs4.ihserc.com/Document/Document/ViewDoc?docid=NRQJDFAAAAAAAAAA

3. REQUIREMENTS

3.1 General requirements: Mortar system and its associated parts shall conform to the applicable drawings provided by the manufacturer. The weapon systems shall be of new production (within

3 years of the delivery date, free of corrosion, gouges, dents, cracks and in good working order.

3.2 Reliability: Each mortar weapon system shall perform the firing, pressure sustaining, projectile launching functions and deliver reasonable accuracy when used with the ammunition sighted within the contract. Additionally the mortar weapon system must be serviceable under conditions including temperature extremes of at least +50C to -25C without interference, erratic movement, or malfunctions. There shall be no impairment in the functioning of mortar assemblies, component assemblies, or component parts, during and/or after firing. After field maintenance is performed, the weapon system must continue to operate in weather/climatic conditions including; snow, rain, mud, salt spray, dust/sand storm and solar radiation.

3.3 Maintainability: The manufacturer must ensure the availability of spare parts for the weapon system for a minimum of 5 years after final delivery. The weapon system must not require special tools other than what is provided by the manufacturer with the weapon at the time of delivery.

3.4 Packaging: Packaging and packing shall be in accordance with section 4.6 of this specification or as otherwise specified in the contract or purchase order.

3.5 Marking: Marking shall be in accordance with section 4.4.1 of this specification or as otherwise specified in the contract or purchase order.

3.5 Durability: The weapon system shall possess the required durability to withstand the rigors of mounted/dismounted patrol and firing all propellant zones from a variety of ground surfaces;

sand, crusher run, loam and hard packed soil.

3.6 Interchangeability: All barrels, assemblies, sub-assemblies and parts shall be interchangeable with all other weapon systems regardless of lot and/or sublot.

3.7 Compatibility: The mortar weapon system must be capable of providing at least 95% of the maximum range when compared to the lot history report of the ballistically tested cartridges.

Note that Meteorological corrections can be applied to the results if necessary.

4. VERIFICATION

4.1 Technical verification. The ammunition shall be subject to all requirements of applicable technical data in addition to verification in accordance with TABLE I of this specification.

Noncompliance to any requirements shall be cause to withhold acceptance of the lot or batch in which the noncompliance was found.

TABLE I. Requirements/Conformance Verification [Lot Acceptance Testing (LAT)]

Section 3

Requirements

Section 4

Verification Procedures

Sample Size

3.1 General requirements 4.1 All systems

3.2 Reliability 4.3 All systems

- 3.3 Maintainability N/A N/A

3.4 Packaging 4.6 All systems

3.5 Marking 4.4.1 All systems

3.6 Durability N/A N/A

3.7 Interchangeability 4.7 All systems

3.8 Compatibility 4.3.5 All systems

4.2 Pre Live fire Inspection;

General; All parts shall be free of dents, bulges, gouges and cracks. Any defects in excess of those listed above, or not covered, must be reported to PD-NSA for engineering disposition.

4.2.1) Barrel; Visually inspect the barrel and breech cap for completeness of assembly/workmanship. The barrels inner diameter shall be inspected at (3) approximately evenly spaced points over the length of the barrel. At each of these lengths the diameter will be measured twice at 90 degree intervals for a total of 6 diameter measurements. These measurements shall ensure interior tolerances as provided by the manufacturer are met.

4.2.2) Bipod Subassemblies; The weapon shall be Cross Leveled, Traverse and Elevated through the full range of motion(s), described in the mortar publications. During these cross leveling, traverse and elevation movements, special care is taken to note any evidence of stiff, binding or erratic operation. Additionally there shall be less than 1/8 of a turn (backlash) of the cross leveling, elevation or traversing hand wheel(s) before movement occurs. Ensure there is no leaking hydraulic fluids (if applicable). The shock absorber shall be manually cycled to determine if there is damage to the buffer subassembly.

4.2.3) Bipod / Barrel interface; The bipod/barrel interface mechanism shall provide a firm clamping force to the barrel. The barrel shall not slide freely when hung under its own weight.

4.2.4) Baseplate; Visually inspect the baseplate and latching socket for completeness of assembly/workmanship.

4.2.5) Barrel / Baseplate interface; The base plate shall be retained on the barrel when hung under its own weight via its latched ball/socket connection.

4.2.6) Weapon site / Dove tail interface;

The sight shall securely latch to its respective dove tail interface.

Step1: Insert the sight unit into the dovetail of the bipod. Anchor the bipod in a vise or similar devise to ensure its immobility. With the bipod at center traverse, aim the right side of the sight unit reticle onto the left side of the blue rectangle on the Weapon Site

Verification Target located in Appendix A of this specification. The distance between the purple and blue rectangles on the Weapon Site Verification Target is 3 centimeters across and placed 100 meters from the site.

Step 2: Level the sight unit, and lock the bipod traverse and sight unit into place.

Step 3: The gunner, while looking through the sight unit, will press forward, with one hand, on the cantilevered sight unit along the line of fire. The force should remove all free play from the sight unit in the dovetail. While looking through the sight unit, the reticle shall not deviate from the center of the object far enough to exceed the sides

(1.5cm) of the object. At this range, a 1.5cm deflection equals 0.15 mils of deflection.

Step 4: The gunner, while looking through the sight unit, will press backwards, with one hand, on the cantilevered sight unit along the line of fire. The force should remove all free play from the sight unit in the dovetail. While looking through the sight unit, the reticle shall not deviate from the center of the object far enough to exceed the sides (1.5

cm) of the object. At this range, a 1.5cm deflection equals 0.15 mils of deflection.

See Appendix A, Weapon Site Verification Target Step 3 & 4 (Pass / Fail)

If the slop in the dovetail/sight unit interface exceeds 0.15 mils in either direction, the results must be reported to PD-NSA for engineering disposition.

4.3 Live Fire Testing:

4.3.1 Seating the Baseplate;

The Baseplate shall be firmly seated to the manufacturer’s satisfaction prior to beginning the proof testing. It is recommended that at least one cartridge be fired at top charge during the seating of the baseplate.

4.3.2 Proof Testing;

It is recommended that cartridges with Inert fill be used during this test, however the decision shall be left to the manufacturer.

Elevation/Traverse; the weapon shall be set to 45 degrees (800 mils) elevation. The traverse shall be centered and the system re-leveled. Depending on the information in the provided publications, the proof pressure shall be determined in using the methods below.

If there is sufficient information for both methods, use the method which yields the highest proof pressure.

Method 1: The cartridge shall be loaded with additional propellant so that its chamber pressure is at least the System Permissible Maximum allowable Pressure (PMP) of the highest pressure cartridge provided under the contract.

Should the cartridge fail to reach a minimum the System PMP up to 4 additional attempts can be made to achieve it. If the barrel fails to reach system PMP in 5 attempts, the barrel shall be re-inspected for damage and the the contractor shall notify the US

Government by contract letter to determine the disposition of the barrel.

Should a cartridge achieve a pressure of over the System Design Pressure (DP), the barrel shall be marked with a red grease pen to ensure it can be differentiated from the other barrels being tested. The contractor shall notify the US Government by contract letter, to determine the disposition of the barrel. The barrel shall not be marked with a proof mark until the disposition by the US Gov. to do so is received. However the barrel may continue to be ballistically tested and inspected as per this specification.

Once a cartridge reaches System PMP to System DP, the Proof test is complete.

Method 2: The cartridge shall be loaded with additional propellant so that its chamber pressure is 5 Standard Deviations (StdDev) in excess of the Maximum Operating

Pressure (MOP).

Should the cartridge fail to reach a minimum of 5 StdDev overpressure up to 4 additional attempts can be made to achieve it. If the barrel fails to reach this minimum in 5 attempts, the barrel shall be re-inspected for damage and the the contractor shall notify the US Government by contract letter to determine the disposition of the barrel.

Should a cartridge achieve a pressure of 10 StdDev or more over pressure, the barrel shall be marked with a red grease pen to ensure it can be differentiated from the other barrels being tested. The contractor shall notify the US Government by contract letter, to determine the disposition of the barrel. The barrel shall not be marked with a proof mark until the disposition by the US Gov. to do so is received. However the barrel may continue to be ballistically tested and inspected as per this specification.

Once a cartridge reaches 5 to 10 StdDev overpressure, the Proof test is complete.

Method 3 (Given ESCP): The cartridge shall be loaded with additional propellant so that its chamber pressure is 12% - 16% in excess of the Extreme Serviceable Conditional

Pressure allowable pressure (ESCP) of the highest pressure cartridge provided under the contract.

Should the cartridge fail to reach a minimum of 16% overpressure up to 4 additional attempts can be made to achieve it. If the barrel fails to reach 16% in 5 attempts, the barrel shall be re-inspected for damage and the the contractor shall notify the US

Government by contract letter to determine the disposition of the barrel.

Should a cartridge achieve a pressure of 16% or more over pressure, the barrel shall be marked with a red grease pen to ensure it can be differentiated from the other barrels being tested. The contractor shall notify the US Government by contract letter, to determine the disposition of the barrel. The barrel shall not be marked with a proof mark until the disposition by the US Gov. to do so is received. However the barrel may continue to be ballistically tested and inspected as per this specification.

Once a cartridge reaches 12% to 16% overpressure, the Proof test is complete.

At the conclusion of the test Proof Testing a report shall be provided to NSA.

At the minimum, the reports should contain the following information:

a. Part name

b. Drawing number and revision

c. Test date

d. Required values

e. Actual values

f. Attribute requirements

g. Attribute requirements verification - Pass/Fail status. If “Fail”, description of failure

h. Copies of associated test reports, for instance, Ultrasound Test reports

i. Lot number

j. Test technician’s/engineer’s name

4.3.3 Traverse Left and Elevation Testing;

The cartridges under contract (2) for this testing shall cartridges with the highest impulse that allows for their maximum range.

Elevation/Traverse; As the weapon shall be traversed and elevated special care shall be taken to note any evidence of stiff, binding or erratic operation. The weapon shall be set to an elevation of 75 degrees (1333 mils). The traverse shall be moved to the far left of its adjustable range and the system re-leveled.

The traverse and elevation shall be check and the system re-leveled before each shot.

4.3.4 Traverse Right and Elevation Testing;

The cartridges under contract (2) for this testing shall cartridges with the highest impulse that allows for their maximum range.

Elevation/Traverse; As the weapon shall be traversed and elevated special care shall be taken to note any evidence of stiff, binding or erratic operation. The weapon shall be set to an elevation of 60 degrees (1067 mils). The traverse shall be moved to the far right of its adjustable range and the system re-leveled.

The traverse and elevation shall be check and the system re-leveled before each shot.

4.3.5 Weapon Sight and Interface verification;

Spotting cartridges shall be used prior to the beginning of the test, however once the test below has begun no additional spotting cartridges are allowed. Every cartridge discharged thereafter shall count toward the pass/fail criteria. With the weapon seated to the satisfaction of the manufacturer, the following tests shall be conducted. All testing, 20 cartridges total shall be High Explosive cartridges set to point detonation mode and shot at maximum charge/range. Between shots within a subtest, only minor leveling/bubble adjustments to the weapon are allowed. Use of sand bags on the base plate and/or bipods are allowed.

Subtest 1: The weapon shall be set to an elevation of 800 mils (45 degrees) and the azimuth set to 82 mils (4.6125 degrees) to the left of center range. (5) HE test cartridges shall be discharged with observers noting their respective range and deflection.

Subtest 2: The weapon shall be set to an elevation of 1156 mils (65.025 degrees) and the azimuth set to 164 mils (9.225 degrees to the right of center range). (5) HE test cartridges shall be discharged.

Subtest 3: The weapon shall be set to an elevation of 800 mils (45 degrees) and the azimuth set to 82 mils (4.6125 degrees to the right of center range). (5) HE test cartridges shall be discharged with observers noting their respective range and deflection.

Subtest 4: The weapon shall be set to an elevation of 1156 mils (65.025 degrees) and the azimuth set to 0 mils, center range. (5) HE test cartridges shall be discharged with observers noting their respective range and deflection.

Evaluation of Range; The average range shall be calculated for Subtest 3 and Subtest 4.

This average shall be evaluated against the respective cartridges’ firing table, at the applicable elevation and shall be within;

Ballistic Range ave. = Firing Table Range +/- [Firing Table Range / 200]

Evaluation of Deflection; The average deflection shall be calculated for Subtest 1 and Subtest 3.

The results shall be considered acceptable if the following criteria are met;

Average Deflection for Subtest 1 Left of center = Ave. Range Sub.T1 X sin(4.6125 degrees)

+/- [Ave. Range Sub.T1 / 400]

Average Deflection for Subtest 3 Right of center = Ave. Range Sub.T3 X sin(4.6125 degrees)

+/- [Ave. Range Sub.T3 / 400]

FIRING MATRIX

Section Subtest Rounds Elevation Cartridge

4.3.1 Seating 1-5 1156 - 1511 mils Any

4.3.2 Proof 1-5 1156 Inert or HE

4.3.3 Traverse Left

and Elevation

2 1067 HE

4.3.4 Traverse Right

and Elevation

2 1067 HE

4.3.5 Weapon

Sighting

20 800-1156 HE

4.4 Post Live Fire inspections;

4.4.1 Marking:

Mortar barrels, assemblies and sub-assemblies shall be clearly and legibly marked to ensure type and correct weapon system use. Such markings shall be in accordance with the requirements and drawings as provided by the manufacturer. Each cannon shall receive a permanent pressure proofing mark/stamp provided it passes all of the Live Fire testing and Magnetic Particle inspection within in this document. No cannon shall be delivered or accepted without a permanent pressure proofing mark/stamp.

4.4.2 Inspections; Mortar barrel

4.3.2.1 Firing pin protrusion: Protrusion of the firing pin from the bottom of the barrel shall be provided by the manufacturer with an applicable tolerance.

4.3.2.2 Interior Dimensions, Leakage and distortion: Visually inspect the barrel and breech cap for distortion, bulging or cracks. The barrels inner diameter shall be inspected at (3) approximately evenly spaced points over the length of the barrel. At each of these lengths the diameter will be measured twice at 90 degree intervals for a total of 6 diameter measurements. These measurements shall ensure interior tolerances as provided by the manufacturer are met. Additionally the barrel shall be leak tested to ensure air tightness.

4.3.2.3 Barrel, Interior surface: The barrel bore surface shall be free of material and processing defects such as cracks, seams, tears, flakes, gouges, scratches, corrosion and pits. The following conditions of the barrel bore surface are acceptable:

a. A scratch having a depth no greater than 0.0004 inch regardless of its width.

b. A pit with a depth no greater than 0.001 and having a diameter or any other major dimension no greater than 0.030 inch, provided that the total number of pits present throughout the bore does not exceed 25 and the total number of pits present in any square inch of surface area does not exceed five.

Any defects in excess of those listed above, or not covered, must be reported to PD-NSA for engineering disposition.

4.3.2.4 Barrel Length: The interior barrel length with applicable tolerance shall be as per the dimensions provided by the manufacturer or +/- .5 cm whichever is smaller

4.3.2.5 Magnetic Particle Inspection of the Barrel: This inspection shall be conducted after all live fire testing has been completed, as per ISO 3452-1, 2, 3, 4 and ISO DIS

9934-1. The entire exterior surface (360 degrees for the full length of the of the barrel including the end cap) shall be inspected twice by magnetic particle inspection with magnetic fields;

1) Parallel to the axis of the barrel

2) Perpendicular to the axis of the barrel

The magnetic particles shall contain a dye which fluoresces when exposed to Ultra Violet light. Inspection for cracks shall be done in a dark room with the aid of an Ultra Violet light, after being exposed to the magnetic particle solution and while the barrel is being exposed to the magnetic field.

4.4.3 Inspections: Bipod

Bipod General Inspection; Ensure all applicable parts are present and are in an unbent condition.

The chain between the bipod legs (if applicable) shall not be broken or show evidence of permanent deformation. Bipod shall fold and unfold without excessive effort.

Bipod Cross leveling, Traverse and Elevation testing; The weapon is Cross Leveled, Traverse and

Elevated through their full range of motion(s). During these cross leveling, traverse and elevation movements, special care is taken to note any evidence of stiff, binding or erratic operation.

Additionally there shall be less than 1/8 of a turn (backlash) of the cross leveling, elevation or traversing hand wheel(s) before movement occurs.

Bipod Clamping interface and shock absorber; The bipod shall provide a firm clamping force to the barrel. The barrel shall not slide freely when hung under its own weight. Inspect the bipod/cannon clamp interface for gouges. Ensure there are no bulges on the shock absorber or leaking hydraulic fluids (if applicable). The shock absorber shall be manually cycled to ensure no damage has occurred.

4.4.4 Inspections: Baseplate

Baseplate General Inspection; These inspections shall be conducted after all live fire testing has been completed. Ensure all applicable parts are present and there is no evidence of permanent deformation and/or cracks. There shall be no binding between the latched ball/socket connection when the barrel is rotated. The base plate shall be retained on the barrel when hung under its own weight via its latched ball/socket connection.

Dye Penetrate Inspection of the Baseplate; Each baseplate shall be subjected to a complete liquid dye penetrate (Zyglo) inspection for cracks and trammel point locations will be marked and measured for each baseplate , as per ISO 3452-4 and ISO DIS 9934-1.

4.4.5 Inspections: Weapon site / Dove tail interface;

The sight shall securely latch to its respective dove tail interface.

Step1: Insert the sight unit into the dovetail of the bipod. Anchor the bipod in a vise or similar devise to ensure its immobility. With the bipod at center traverse, aim the right side of the sight unit reticle onto the left side of the blue rectangle on the Weapon Site

Verification Target located in Appendix A of this specification. The distance between the purple and blue rectangles on the Weapon Site Verification Target is 3 centimeters across and placed 100 meters from the site.

Step 2: Level the sight unit, and lock the bipod traverse and sight unit into place.

Step 3: The gunner, while looking through the sight unit, will press forward, with one hand, on the cantilevered sight unit along the line of fire. The force should remove all free play from the sight unit in the dovetail. While looking through the sight unit, the reticle shall not deviate from the center of the object far enough to exceed the sides

(1.5cm) of the object. At this range, a 1.5cm deflection equals 0.15 mils of deflection.

Step 4: The gunner, while looking through the sight unit, will press backwards, with one hand, on the cantilevered sight unit along the line of fire. The force should remove all free play from the sight unit in the dovetail. While looking through the sight unit, the reticle shall not deviate from the center of the object far enough to exceed the sides (1.5

cm) of the object. At this range, a 1.5cm deflection equals 0.15 mils of deflection.

See Appendix A, Weapon Site Verification Target Step 3 & 4 (Pass / Fail)

If the slop in the dovetail/sight unit interface exceeds 0.15 mils in either direction, the results must be reported to PD-NSA for engineering disposition.

4.5 Documentation

At the completion of mortar verification, the test authority will document all pertinent data regarding the hardware under test/inspection in a report. The report will include the test authorities recommendation of acceptance or non-acceptance. A copy of the Live

Fire Test report and Inspection report shall be provided for each mortar system (or its major components if purchased separately). These reports shall be sent to:

usarmy.pic.peo-ammo.list.pm-nsa-ops-cell@mail.mil

4.6 Packaging: The weapons shall be delivered with applicable packaging, lubricants and protectants to ensure the weapon system does not deteriorate during transportation and/or sheltered long term storage. The systems must be palletized and in accordance with ISPM-15 standards. Steel strapping shall be used to constrain the cargo/weapon system. Dunnage shall be used to ensure the strapping does not damage the palletized hardware.

4.7 Interchangeability: All systems shall be broken down into their bipod, base plate and barrel assemblies. The barrels from each respective system shall be moved one system to the right.

The baseplates from each respective system shall be moved one system to the left. The bipods shall remain in their respective locations. All systems shall be capable of being reassembled. If it is not possible to reassemble the systems, the contractor shall notify the US Government by contract letter, to determine the disposition of the systems.

mailto:usarmy.pic.peo-ammo.list.pm-nsa-ops-cell@mail.mil

5. NOTES

(This section contains information of a general nature or explanatory nature that may be helpful, but is not mandatory.)

5.1 Acquisition requirements.

Acquisition documents should specify the following:

a. Title, number, and date of the specification

b. List of drawings, specifications, and publications pertinent to the mortar system technical details and usage; showing revisions and dates of revisions

c. Shipping instructions for each mortar, or its major subassemblies (cannons, bipods, and baseplates) if purchased separately

d. Provisions for submission of first article samples. Applicability of First Article

Inspection (FAI).

e. Serialization requirements should be as specified in corresponding drawings

5.2 Accuracy of commercial inspection equipment.

When commercial and modified commercial inspection equipment is used, it should be capable of repetitive measurements to accuracy of 10 percent of the total tolerance of the characteristic that is measured.

5.3 Accuracy of proof pressure measuring devices.

Each crusher gage that is used for measuring proof firing pressures should have an accuracy that meets the maximum error of measurement as specified in NATO AEP-23.

5.4 Standard Measuring and Test Equipment (SMTE).

Where SMTE is specified, the manufacturer may use any inspection method that meets the accuracy requirement above. In addition, when approved by the procuring activity, the characteristic may be inspected using a qualified tool (tool control) in lieu of inspecting the characteristic. The inspection results for the qualified tool should be provided to the procuring activity upon request.

5.5 Calibration.

All inspection and test equipment should be calibrated in accordance with the requirements of NCSL Z540.3 or ISO 10012. Proof of calibration should be provided upon demand.

5.6 Maintenance and disposal.

Unless otherwise specified in the contract, maintenance and disposition of inspection equipment should be in accordance with MIL-I-45607.

5.7 Performance characteristics inspection and verification.

All requirements should be verified with approved equipment, specified tests, examination, and procedures.

5.8 Materials and geometric configuration.

Complete and accurate substantiating documentation supporting the acceptability of each mortar system and the components thereof should be compiled and maintained by the manufacturer for the life of the individual weapon. Failure to comply with the drawings requirements, unless specifically waived in the contract, should be cause for rejection.

5.9 Nonconformance.

If any assembly, component, or test specimen fails to comply with any of the requirements of this specification, that unit should be removed, and the actions in MIL-

STD-1916 for nonconforming product should be enforced. No repair is authorized unless repair work instructions are approved by the Government.

5.10 Alternative inspection provisions. Alternative conformance procedures, methods, or equipment, such as statistical process control, tool control, other types of sampling procedures, may be used by the contractor when they provide as a minimum the level of quality assurance required by the provisions specified herein. Prior to applying methods or equipment, the contractor should describe them in a written proposal submitted to the

Government for evaluation. When required, the contractor should demonstrate that the effectiveness of each proposed alternative is equal to or better than the specified quality assurance provision(s) herein. All approved alternative provisions should be specifically incorporated into the contractor's quality program or detailed inspection system, as applicable.

Weapon Site Verification Target

Paragraph 4.1.6 and 4.3.5; Step 3 & 4 (Pass / Fail)

The right side of the cross hair shall not pass the right edge of the of the blue rectangle

The right side of the cross hair shall not pass the right edge of the of the purple rectangle