Draft SOW - 5.56 Rifle.pdf

STATEMENT OF WORK (SOW)

5.56 x 45mm Rifle

United States Secret Service (USSS)

2.0 REQUIREMENTS

2.1 General The USSS has a requirement for a 5.56 x 45mm duty rifle, equipped with semi-automatic firing capability, and sound suppression for use in all environmental conditions.

The weapon shall be commercially available and exhibit a ‘manual of operation’ consistent with the agency’s existing SR16 AR style Service Rifles. All weapons procured under this solicitation shall be of new manufacture. (rebuilt, overhauled, remanufactured, or "seconds" shall not be accepted).

2.2 Design Requirements

2.2.1 The weapon shall be operable, without modification or alteration, by a right-handed shooter.

2.2.2 The offeror(s) must be the original equipment manufacturer (OEM) of the serialized lower receiver. Site inspection by the Government of the manufacturing facility may be required.

2.2.3 All external metal parts of the weapon shall have a dark subdued, rust/corrosion resistant finish. The finish shall be unaffected by commercially available gun cleaning solvents, such as Simple Green, used in heated ultrasonic cleaning tanks.

Flaking, peeling, blotching, etc. of the finish is unacceptable.

2.2.4 The weapon shall be chambered in accordance with current SAAMI

Specifications for 5.56 x 45mm, and function with assorted ammunition ranging in weight from 55 to 77 grain (to include all common SAAMI-spec and Mil-Spec ammunition) as well as frangible ammunition.

2.3 Dimensional Requirements:

Height (no taller than, w/o accessories or magazine

8 inches

Weight, including suppressor (no heavier than, w/o accessories or magazine)

8 pounds

Overall length (no longer than, w/stock folded, including suppressor)

29 inches

Barrell length – (min – max) (measured from closed bolt face to end of muzzle, not including muzzle device)

12.25 – 14 inches

2.4 Operating System

2.4.1 The weapon shall utilize a direct-impingement gas-operated system or a short-stroke gas piston system.

2.5 Barrel

2.5.1 The barrel shall have a minimum service life of 10,000 rounds.

2.5.2 Barrel service life is defined as not exceeding 2 Minutes-of-Angle (MOA) and exhibiting no more than 125 ft/sec decrease in velocity (in accordance with USSS velocity testing procedures), with observance of offeror’s submitted maintenance protocols.

2.5.3 The barrel shall be free of cracks, seams, and other injurious defects and the bore and chamber shall be free of pockets, rings, bulges, and other deformations. The bore and chamber shall be chromium plated, or of equivalent corrosion resistance. Any coating in the chamber and bore shall be free of nodules, flaking, pits, stripping, anode burrs and evidence of etched base steel. Burrs and sharp edges shall be removed from the chamber edges and bolt locking lugs.

2.5.4 The muzzle should be equipped with the appropriate attachment device for mating with the included sound suppressor. Crush washers are not acceptable.

2.6 Suppressor

2.6.1 The rifle shall be supplied with the HUXWRX FLOW 556K suppressor

2.6.2 Suppressor shall be mounted to manufacturer specifications.

2.7 Mode of Fire

2.8

2.8.1 The weapon shall be semi-automatic.

2.9 Fire Selector

2.9.1 The fire control selector shall be ambidextrous in design and be a single lever paddle mounted on the side of the receiver, adjacent to the rear pistol grip, thereby not requiring the shooter to significantly break their firing grip when actuating.

2.9.2 The fire control selector shall be a rotary type and shall have two positions; safe and semi-automatic and shall rotate manually without binding from one position to another when the hammer is cocked. The fire selector lever shall rotate 90 degrees from SAFE to Semi-automatic. The selector shall remain in place in each position by a perceptible spring detent load until manually reset.

2.9.3 With the hammer cocked, when the selector is placed in the "SAFE" position, it shall prevent the trigger from releasing the hammer so that the weapon is incapable of being fired.

2.9.4 When the selector is placed in the "SEMI AUTOMATIC" position, it shall have a disconnect, so that the weapon is capable of semi-automatic fire only (one shot with each pull of the trigger).

2.9.5 The fire selector lever shall be ambidextrous.

2.10 Trigger

2.10.1 The trigger shall be a non-adjustable two stage trigger. Weight shall be 4.0 lbs.

min and 6.5 lbs. maximum.

2.10.2 The trigger shall have a smooth face, cannot be wider than the trigger guard. Any other controls (bolt catch/release, magazine/catch release, etc.) inside the area enclosed by the trigger guard are not acceptable.

2.10.3 While utilizing gloves, the trigger shall not pinch the trigger finger between the trigger and the side of the receiver or between the trigger and the inside bottom of the trigger guard (see Note 1). Any manipulation/modification to the trigger guard to meet this requirement is not acceptable

2.11 Charging Handle

2.11.1 The charging handle shall be situated in the upper receiver.

2.11.2 The charging handle shall not reciprocate with the bolt when the weapon is fired.

2.11.3 The charging handle shall be capable of being operated with one hand while the shooters other hand is grasping the pistol grip or forend grip.

2.11.4 The charging handle shall be ambidextrous with a latch release system.

2.12 Bolt Hold-Open Device

2.12.1 The rifle shall be equipped with a magazine activated bolt hold open device.

2.12.2 The bolt hold open device shall also be capable of being activated manually by the operator.

2.12.3 When the bolt hold open device is activated by the magazine follower and the magazine is subsequently removed, the bolt shall remain in the rear or open position.

2.12.4 When the bolt is in the rear or open position and a full magazine is inserted, the bolt shall remain in the rear or open position until the operator manually activates the bolt catch.

2.12.5 When the bolt hold open is released, the bolt shall return to the battery position.

2.13 Magazine The weapon magazine well shall be compatible with the Magpul PMAG 30

AR/M4, 5.56x45 Magazine (NSN 1005-01-628-5106 and NSN 1005-01-615-5169).

2.13.1 The magazine release shall securely retain the magazine in the magazine well. The magazine (whether empty or full) shall fall free from the magazine well once the magazine release button is activated without any further operator assistance. The magazine release button shall be spring loaded, and the design of the receiver shall provide some shielding against inadvertent activation when placed against standard USSS uniform and/or body armor. The activation of the magazine release button shall be accomplished with minimum effort by the operator with only one hand.

2.14 Lower Receiver The lower receiver shall be serialized and be warrantied, by the offeror, for a minimum of 20,000 rounds.

2.15 Upper Receiver The weapon shall be equipped with a Mil-Std-1913 Picatinny attachment rail on the top of the receiver for mounting of optics, iron sights, lasers, etc. (see Note 2)

2.16 Forend/Handguard The weapon shall have a modular free-floating handguard assembly measuring no less than 9.0 inches (measured along the 6:00 o’clock position of the rail), with no less than less than 8.0 inches of configurable rail (1913) mounting space at each of the 3:00, 6:00 and 9:00 o'clock positions. “Configurable rail mounting space” will be defined as the ability to interface Mil-Std-1913 attachments, either directly or through removable interface segments mounted via M-Lok.

2.16.1 The handguard assembly shall have the ability to attach Mil-Std-1913 Picatinny rail segment along the length of the handguard at the 3:00, 6:00 and 9:00 o'clock positions simultaneously. The contractor shall provide enough rail segments, in 3,5 or 7 slot aluminum M-Lok Rail Segments to cover the length of the handguard at the 3:00, 6:00 and 9:00 o'clock positions simultaneously. Handguards with permanently attached Mil-Std 1913 Picatinny rails sections the length of the handguard at the 3:00, 6:00 and 9:00 o'clock positions shall also be considered.

2.16.2 The handguard assembly shall have the ability to attach a QD sling swivel at the at any point along the 3:00 or 9:00 o’clock position of the rail in conjunction with the rail segments listed in 2.2.1. Handguards with permanently attached QD Swivel sockets at the 3:00 and 9:00 o’clock position will be considered but shall be in accordance with 2.18.1 & 2.18.2.

2.16.3 When assembled to the weapon, the upper most rail of the free-floating handguard assembly shall align and be at the same height as the rail on the receiver. A one-piece receiver/handguard assembly is acceptable if the barrel is free-floating, the above rail positioning interfaces are present, and handguard portion meets the minimum length requirement detailed in 2.14 (note 2).

2.17 Pistol Grip

2.17.1 The rear pistol grip shall be securely attached to the lower portion of the receiver and shall not interfere with the operation of the selector lever.

2.17.2 The rifle shall be equipped with the MAGPUL MIAD GEN 1.1 Grip Kit – Type 1 #MAG520. Black in color.

2.18 Buttstock

2.18.1 The rifle shall be equipped with the MAGPUL CTR Carbine Stock #MAG310 affixed to the rifle with a folding stock adapter. Black in color.

2.19 Sling Mount

2.19.1 The weapon shall be supplied with means to mount a sling to, at minimum, the rear area of the receiver and the handguard, via quick-detach swivel.

2.19.2 All sling mounting/attachment points shall be rotation limited (4-position) quick detach cups, to allow interface with quick detach push button swivels.

NOTE 1: The glove utilized for testing will be the Outdoor Research “Ironsight Sensor Glove”.

NOTE 2: Total length combined between the upper receiver and handguard must be at least 16.375 inches of Mil-Std-1913 Picatinny rail at the 12 o’clock position. Measurement will begin at the forward edge rear most slot and be measured to the forward edge of the foremost slot.