1、 MIL-PRF-32327 (AR) 20 March 2009 PERFORMANCE SPECIFICATION RIFLE, CALIBER .50: SNIPER W/DAY OPTIC SIGHT AND CARRYING CASES - M107 This specification is approved for use by the U.S. Army Armaments Research, Development and Engineering Center (ARDEC) and is available for use by all Departments and Ag
2、encies of the Department of Defense. 1 SCOPE 1.1 Scope. This specification prescribes the performance requirements and identifies the verification procedures for the RIFLE: caliber .50, sniper w/day optic sight and carrying cases, M107. This specification contains components as defined in section 6.
3、6, hereafter referred to simply as M107. 1.2 Type-designator. The Army type-designator M107 referenced in this specification is of Army origin and does not reflect a particular design. (See 6.3). 1.3 Requirement levels. This specification lists two values for certain performance parameters. The thre
4、shold value (T) is the minimum acceptable value, and the objective value (O) is the desired value for which the performance of the M107 results in operationally significant increase in capabilities. All requirements not noted are threshold requirements. 1.4 Component designation. This specification
5、contains four component requirement designations: System requirements, Rifle requirements, Optic sight requirements, and System case requirements. Unless otherwise specified, the system requirements apply to the rifle, the day optic sight, and the carrying case. Unless otherwise specified the rifle
6、requirements apply to the rifle only, the optic sight requirements apply to the sight only, and the system case requirements apply to the system cases only. AMSC N/A FSC 1005 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. INCH-POUNDComments, suggestions, or questio
7、ns on this document should be addressed to Commander ARDEC, ATTN: RDAR-QES-E, Picatinny, NJ 07806-5000) or emailed to (ardecstdznconus.army.mil). Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.dap
8、s.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32327 (AR) 22 APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 or 4 of this specification. This section does not include documents ci
9、ted in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this s
10、pecification, whether or not they are listed. 2.2 Government documents. 2.2.1 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 th
11、ose cited in the solicitation or contract. FEDERAL SPECIFICATIONS TT-C-490 Chemical Conversion Coatings and Pretreatments for Ferrous Surfaces (Base for Organic Coatings) DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-3150 Lubricating Oil, Preservative, Medium MIL-PRF-14107 Lubricating Oil, Weapons, L
12、ow Temperature MIL-DTL-16232 Phosphate Coating, Heavy, Manganese or Zinc Base MIL-C-60162 Cartridge, Caliber .50, Test, High Pressure, M1 MIL-PRF-63460 Lubricant, Cleaner and Preservative for Weapons and Weapon Systems DEPARTMENT OF DEFENSE STANDARDS MIL-STD-810E Environmental Engineering Considerat
13、ions and Laboratory Tests MIL-STD-1474 Noise Limits MIL-STD-1913 Dimensioning of Accessory Mounting Rail for Small Arms Weapons MIL-STD-1916 DOD Preferred Methods for Acceptance of Product (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or from the Standardi
14、zation Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111- 5094.) 2.2.2 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
15、specified, the issues of these documents are those cited in the solicitation or contract. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32327 (AR) 3US ARMY DEVELOPMENTAL TEST COMMAND TOP 3-2-045 Automatic Weapons, Machine Guns, and Hand and
16、 Shoulder Weapons TOP 3-2-504 Safety Evaluation of Hand and Shoulder Weapons TOP 3-2-609 Chemical Compatibility of Nonmetallic Materials Used In Small Arms Systems (Copies of these documents may be ordered from the US Army Developmental Test Command, ATTN: Publications, 314 Longs Corner Road, Aberde
17、en Proving Ground, MD 21005-5005, or online at http:/www.dtc.army.mil/publications/topsindex.aspx.) 2.3 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 s
18、olicitation or contract. ASTM INTERNATIONAL ASTM E1417 Standard Practice for Liquid Penetrant Testing ASTM E1444 Standard Practice for Magnetic Particle Testing (Copies of ASTM standards are available online from http:/www.astm.org/ or from the American Society for Testing and Materials, 100 Barr Ha
19、rbor Drive, Conshohocken, PA 19428-2959.) 2.4 Order of precedence. Unless otherwise noted herein 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
20、 applicable laws and regulations unless a specific exemption has been obtained. 3 REQUIREMENTS 3.1 Design verification. When specified (see 6.2), a sample of M107 and components shall be subjected to design verification in accordance with Table I and 4.2. 3.2 First article inspection. When specified
21、 (see 6.2), a sample of M107 and components shall be subjected to first article inspection in accordance with Table I and 4.3. 3.3 Conformance inspection. When specified (see 6.2), a sample of M107 and components shall be subjected to quality conformance inspection in accordance with Table I and 4.4
22、. 3.4 Operating requirements. 3.4.1 System requirements. 3.4.1.1 Accuracy (personnel- sized targets). The rifle with Day Optic Sight attached and zeroed, shall be capable of acquiring and engaging personnel-sized targets, 4.869 x 1.489 Provided by IHSNot for ResaleNo reproduction or networking permi
23、tted without license from IHS-,-,-MIL-PRF-32327 (AR) 4feet (1.484 x 0.454 meters), at 1,968.5 feet (600 meters) (T), and 4,921.2 feet (1,500 meters) (O). At either distance, one shot out of six (T), five shots out of six (O) shall hit the target. 3.4.1.2 Accuracy (vehicle sized targets). The rifle w
24、ith Day Optic Sight attached shall be capable of acquiring and engaging vehicle sized targets, 7.55 x 15.09 x 7.55 feet (2.3 x 4.6 x 2.3 meters), at 3,280.83 feet (1,000 meters) (T), and 6561.66 feet (2,000 meters) (O). At either distance, one shot out of ten shall hit the target. 3.4.1.3 Dispersion
25、. When using the rifle, with Day Optic Sight attached, the distance between the centers of the best five (5) rounds (after firing a six (6) round shot group at a target located 328.083 feet (100 meters) from the rifle) shall be less than 2.5 inches when fired with Cartridge, Caliber .50, Ball, M33 a
26、mmunition or equivalent. 3.4.2 Rifle requirements. 3.4.2.1 Functioning. The rifle shall fire 10 rounds, using magazine supplied with the system, without stoppages, malfunctions, unserviceable parts, or pierced primers, when firing M33 ammunition or equivalent. 3.4.2.2 High pressure resistance. After
27、 the proof firing of one Cartridge, Caliber .50: Test, High Pressure, M1 round as specified in MIL-C-60162, or approved equivalent, the barrel, bolt and barrel extension shall be free of cracks. 3.4.2.3 Firing rate. The rifle shall fire not less than 10 rounds per minute, under steady-state firing,
28、including magazine changes. 3.4.2.4 Rifle action. The rifle action shall be semi-automatic, (see 6.4). 3.4.2.5 Safety. The rifle shall have a safety device with the following characteristics: a. It can be placed in either the “safe” or “fire“ position. b. It prevents the weapon from being fired when
29、 the trigger is depressed with the safety in the “SAFE” position. c. It is movable between the safe and fire positions by the operator without moving his hands from the shooting position (prone, standing, kneeling, and sitting). d. It remains in the position the operator sets it until it is manually
30、 changed. e. It performs all operations at all temperatures in the operating range (-50 F through 145F). f. It is operable by a person (5thto 95thpercentile) dressed in cold weather environmental clothing (except for the outer arctic mitten) and NBC (MOPP IV) hand gear. g. It is capable of being che
31、cked by both sight and touch. h. The design of the rifle shall preclude firing while the bolt is not in the closed and locked position, or when the bolt is being closed. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32327 (AR) 53.4.2.6 Reco
32、il. The recoil of the rifle shall not be greater than 60 ft-lbs, when firing the Cartridge, Caliber.50: Armor-Piercing-Incendiary, MK211 API or Cartridge, Caliber.50: ball, M33. 3.4.3 Day Optic sight requirements. 3.4.3.1 Elevation and windage adjustment. Elevation and windage adjustments on the Day
33、 Optic Sight shall be provided with the following characteristics: a. Clearly marked graduations that provide tactile feedback during movement. b. Increments of 0.25 minutes of angle (MOA). c. The zero position of the reticle shall move not more than 0.5 MOA from the optical axis when cycled from ze
34、ro to the extreme adjustments and returned. 3.4.3.2 Elevation and windage range. There shall be sufficient elevation adjustment to engage targets out to 6561.66 feet (2000 meters). 3.4.3.3 Magnification. The Day Optic Sight shall have a variable range of magnification. The low power setting shall be
35、 no less than 3x and no greater than 4.5x and the high power setting shall be no less than 14x and no greater than 16x. 3.4.3.3.1 Power zero retention. The Day Optic Sight shall have variable/adjustable power and shall retain zero throughout all power settings. With the sight zeroed at the high powe
36、r setting the line of sight shall retain its zero setting within 0.5 MOA throughout the entire range of magnification. 3.4.3.4 Field of view. The Day Optic Sight shall have a field of view (FOV) that is not less than 1 degree at the highest magnification setting, and not less than 3 degrees at the l
37、owest magnification setting. 3.4.3.5 Objective opening. The objective end of the day optical sight shall have an internally threaded interface for accepting a laser filter unit (LFU) Tactical Rifle Scopes, 50mm (NSN 1240-01-502-1295). 3.5 Interface and interoperability requirements. 3.5.1 System req
38、uirements. 3.5.1.1 Weight. The rifle with bipod, mounted Day Optic Sight, and an unloaded magazine shall weigh no more than 35 pounds (T), 25 pounds (O). 3.5.1.2 Exterior surfaces. All exposed exterior surfaces of the M107 shall be dull/non-reflective. The external color of the entire weapon shall b
39、e a tan, black, or gray, to accommodate various camouflage combinations. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32327 (AR) 63.5.1.3 Ambidextrous use. The system shall be capable of use by either a right or left handed firer. 3.5.2 Ri
40、fle requirements. 3.5.2.1 Blank firing. The rifle shall be capable of firing blank ammunition when chambered manually (T), and shall be fully capable (semi-automatic) with Blank Firing Adapter (BFA) (see 6.4) (O). 3.5.2.2 Headspace. The headspace shall be not less than 3.134 inches and not greater t
41、han 3.144 inches. 3.5.2.3 Firing pin protrusion. The firing pin protrusion shall be not less than 0.057 inches and not greater than 0.063inches. 3.5.2.4 Trigger pull. The trigger pull of the rifle shall be not less than 7 pounds, and not greater than 9 pounds. The trigger shall return to its normal
42、forward position upon release after partial or complete trigger pull. 3.5.2.5 Noise. The rifle, when firing either the MK211 Armor Piercing Incendiary or M33 ball cartridge, shall have impulse noise levels that are not greater than the decibel limits for double hearing protection in accordance with
43、Impulse noise daily exposure limits (Table 4-I) and Peak sound pressure levels and B-duration limits for impulse noise (Figure 4-1) of MIL-STD-1474. 3.5.2.6 Ammunition compatibility. The rifle shall safely fire the following rounds of Caliber .50 ammunition. Cartridge, Caliber.50, Armor-Piercing-Inc
44、endiary, MK211 Cartridge, Caliber .50, Ball, M33 Cartridge, Caliber .50, Tracer, M17 Cartridge, Caliber .50, Armor-Piercing-Incendiary, M8 Cartridge, Caliber .50 Armor-Piercing-Incendiary-Tracer, M20 Cartridge, Caliber .50, Test, High Pressure, M1 Cartridge, Blank, Caliber .50, M1A1 (excluding extra
45、ction, unless a Blank Firing Adaptor is available) 3.5.2.7 Magazine. Five detachable magazines, each with a capacity of ten rounds, shall be provided with each weapon. The magazines shall be capable of being removed from the rifle using only one hand; bare handed and with NBC (MOPP IV) hand gear. 3.
46、5.2.8 Mounting interface. The rifle shall be provided with two MIL-STD-1913 Picatinny Rails. One rail shall be on the top of the receiver, at a 27 minute angle to the bore, oriented high in back and low towards muzzle, and shall accommodate the mounting of the Day Optic Sight. The second mounting ra
47、il shall be parallel to the bore, but not on the top of the receiver to accommodate mounting accessory equipment. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-32327 (AR) 73.5.2.9 Disassembly. The rifle shall be capable of being easily disa
48、ssembled into its major components without the use of special tools. 3.5.2.9.1 Disassembled length. The maximum overall length of any individual component after disassembly shall not be greater than 49 inches (T), 36 inches (O). 3.5.2.10 Bipod. The rifle shall have a bipod with the following charact
49、eristics: a. It shall be detachable. b. It shall have legs, which are independently adjustable in length. c. It shall have legs that provide rigid support when firing from the prone position. d. It shall have legs that fold, allowing the weapon to be stored, in its case, without removing the bipod. e. It shall have a height, from the ground to the attachment point, of not greater than 11 inches and not less than 7 i
