ARMY MIL-L-45935A-1974 LAUNCHER GRENADE 40MM DETACHABLE M203.pdf

1、5 September 1974 SUPERSEDING MIL-L-45935 24 September 1971 (see Section 6) MILITARY SPECIFICA!LTON LAUNCHER, GRENADE, 40ME.I: DETACHABLE, M203 This specification is approved for use by all Departments and Agencies of the Department of. Defense. 1. SCOPE 1.1 This specification covers one type of deta

2、chable, pump-action single-shot, grenade launcher which is shoulder-fired when attached to the 16 and Ml6A1, 5.5b Rifle. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invi- tation for bids or request for proposal, form a part of the specification to the exten

3、t specified herein: SPECIFICATIONS Military MIL -W- 13855 MIL- P-14232 MIL-1-45607 MIL-L-46000 STANDARDS Military MIL-STD-O MIL-STD-log MIL-STD- Weapons, hall Arms and Aircraft Armament Subsystems, General Specification for. Parts, Equipnent and Tools for Army Materiel, Packaging and Packing of. - -

4、 Inspection Equipnent , Acquisition , Maintenance and Disposition of. Lubricating Oil, Semi-Fluid Automatic Weapons. Sampling FYocedures for Inspection by Attributes. Quality Assurance Terms and Definitions. Reliability Tests: Exponential Distribution. FSC 1010 “HIS DOCUMENT CQNTAIMS 4 PAGES, A- Pro

5、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-45735A LO 7997706 O307397 7 rn-L-4593SA DRAWINGS U.S. Army Weapons Conmiand F8448 300 - Launcher, Grenade, bMM: M203. FUBLICATIONC U.S. Army Weapons Command pu838703 - Packaging Data Sheet for Launch

6、er, Grenade, bMM: Detachable, M203. ml3448300 - List of-Inspection Equipment Nunibers. (Part drawings referenced in this specification form a psrt of Drawing F8448300; inspection equipment drawings form a part of List IEL8448300.) (Copies of specifications, standards, drawings and publications requi

7、red by suppliers in connection with specific procurement functions should be obtained fromthe procuring activtty or as directed by the oontracting officer . ) 3. m- * 3.1 First article. Requirements for submission of flrst article shall be as specified in the contract (see 6.1). specified (set? 6.1)

8、, the first article shall inclue the pilot pack (see 5.1). Unless otherwise * 3.2 Materials, construction and design. Launcher and parts shall conform to the material, construction and design requirements specified herein, on Drawing F8448300 and MIL-w-13855. * 3*2.1 Barrel. The barrel SU be free of

9、 cracks and seams, and the lands, grooves, and chaniber shall be Wee of nicks, burs and pits. Electrical plating contact marks shall be allowed only on the surface where electrical connections are permitted. uniform in appearance and free of flaking, powdery areas and discon- tinuities such as break

10、s and scratches. The anodic coating shall be 3.2.2 Barrel assembly TOUP. 3.2.2.1 Pump actuation. The barrel assembly shall be capable of pump- actuation when the barrel latch is depressed. The barrel assembly shall be oapable of forwa;rd and rearward movement over its full range of travel. The maxim

11、um force required to move the .unloaded bwrel assembly from the unlocked position to the maximum forward open position and returned to the closed locked position shall- not exceed 14 pounds. Under loaded 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-

12、,-,-7 NIL-L-45935A 10 7999906 0309400 T MIL-L-45935A conditions using cartridge bmm, XM38p4 (dq, inert) the maximum forces shall not exceed 28 pounds. 4.5.3.2. Testing shall be as specified in 3.2.2.2 Barrel stop. Upon opening of barrel assembly to full open position, the barrel stop shall exert suf

13、ficient pressure on the barrel to Uow retention of the barrel. in the fuL1 open position as the launcher is held in the vertical position with the muzzle upward. of 4.0 pounds maximum shall be required to move the barrel assembly from this position. Testing shall be as specified in 4.5.3.2. A force

14、* 3.2.2.3 Barrel latch. The barrel latch shall move through its full range of travel under spring action without binding. shall pivot under thun pressure to release the barrel assembly for movement to the open position. until the barrel assembly is closed. the barrel out of the locked battery positi

15、on manually until the barrel latch has been depressed. barrel Latch shall be 1.5 pounds minimum to 8.0 pounds maximum. shall be as specified in 4.5.3.2. The barrel latch The barrel latch SU remain unlocked It shaU. not be possible to move The force required to manually actuate the Testing 3.2.2.4 Ca

16、rbridge retainer. The cartridge retainer clips shall be capable of deflection through their full range of travel without binding or permanent deformation. holding a fully inserted bmm cartridge within the barrel chamber, when the launcher is held in the vertical position with the muzzle upward an th

17、e barrel opened to the full open position. of movement through its fuU range of travel without binding and shay exhibit a force of 8.0 pounds minimum to 12.0 pounds maximuin when de- flected flush plus .O20 inches with face of the barrel. The cartridge locator spring shall deflect through its fuU ra

18、nge of traveluithout binding or permanent deformation. 4.5.3.2. The cartridge retainer shall be capable of 3.2.2.5 Cartridge locator. The cartridge locator shall be capble Testing shall be as specified in 3.2.3 Receiver group. * 3.2.3.1 Extractor. The extractor shall function through its full range

19、of travel under spring action without binding. Upon locking the barrel into the battery position with the cbanibered cartridge, the ex- tractor shall cam downward upon contact with the cartridge and allow the barrel with cartridge to be locked in the battery position. The extractor hook shall engage

20、 the cartridge rim and retain the cartridge within the receiver to allow clearing of the barrel chamber as the barrel assembly is mved to the open forward position. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-45735A 20 9 7777706 030740L L

21、 W 3.2.3.2 Cartridge ejector. The cartridge ejector SU be capable of movement through its full range of travel without binding and sbl. exhibit a force of 2.75 pounds minimum to 6.75 pounds maximum when de- flect the secondary sear shall retain the firing pin until the trigger is allowed to return t

22、o its forward position, where the trigger sear shall engage the firing pin notch before the secondary sear re- leases the firing pin. * 3.2.3,s Breech insert. The breech insert shall be securely seated . and torqued to 50 inch-pounds f 5 inch-pounds so that the breech insert fsce is flush to .O07 in

23、ch below the breech face surface of the receiver. After the breech insert has been securely seated and torqued, the sealing compound shall be allowed to cure for not less than 24 hours. torque of the breech insert from the receiver shall be not less than i30 inch-pounds. Torque readings shall be tak

24、en at i/k, 1/2, 3/4 and 1 full turn. torque, and shall be not less than 70 inch-pounds. The firing pin hole sballbe free of residue that trould affect firing pin movement or freedom of other moving parts, firing stroke ithout interference. The breaking The average of these four(4) readings shall be

25、considered the locking Testing shall be as specified in 4,5.3.8. 3.2.3.6 Firing pin. The firing pin sfaall move forward through its * 3.2.3.7 Firing p5n indent. The firing pin indent shall be a depth of .O08 inches minimum to .OX2 inches xaximm. not be off center more than one-half the diameter of t

26、he firing pin point. Testing shall be as specified in 4.5.3.3. The firing pin indent shall * 3.2.3.8 Firing pin pmtxngion. The firing pin protrusion SU be .O32 inches nimu to .27 mauinwii. Testing shall be as specified in 4.5.3.3. 3.2.3.9 Trigger puli. The trigger null ch11 3e free of creep and shal

27、l be greater than 5 pounds but sbx,l not exceed Il pounds. shall be interpreted to mean any perceptible rough niovenent between the time the trigser slack is taken up and the firfng pin released. 4 Creep After Provided by IHSNot for ResaleNo reproduction or networking permitted without license from

28、IHS-,-,-MIL-L-45735A LO 7799706 0309402 3 W MIL-L- 45 935A partial or completed trigger pull the trigger shall return to its normal forward position under spring action. Testing shall be as specified in 4.5 . 3 04. 3.2.3.10 Trigger guard. The trigger guard shall pivot freely through its full range o

29、f travel. 3.2.3.U Safety. * 3.2.3.U.1 Battery position. The barrel when locked in battery position, and the trigger in forwart3 position, the safety shall move between safe“ and “fire“ positions, an retained in the set position under spring-action of the spring plunger. The safety when positioned in

30、 the “fire“ position (firing pin cocked) the firing pin shall release as the trigger is puilea. The safety when positioned in the “safe“ position, the safety shall prevent firing of the launcher. The firing pin shall remain cocked when the safety is moved from safe“ to “fire“ position. * 3.2.3.L2 Sa

31、fety actuation torque. The torque required to move the safety fromthe “safe“ position to the “fire“ position, or reverse, shall be 1 inch-pounds minimum to 9 inch-pounds maximum. be as specified in 4.5.3.4, Testing shaii 3.2.4 -ont sling swivel assembly. The Uuncher shaU be provided with a replaceme

32、nt front sling swivel assembly; consisting of a swivel mount, locking bar and two (2) pins and rgvet for assembly to the 141-6 or Ml6Al rifle front sight base. 3.2.5 Leaf sight assembly, justable to a31 range and deflection settings, and shall exhibit the following accuracy of alinement: The leaf si

33、ght assembly shall be ad- Range Setting 50 Deflection An le -e O01 i- o 55 oolg T: 102 0030 T: 1014 0035 7 - 1022 024 108 The spring tension acting on the components of the leaf sight assembly shall maintain alinement of their selected position when the sight blade is in the raised position. Testing

34、 shall be as specified in 4.5.3.5* 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-q5935A LO W 9799906 0309q03 5 3.3 Performance characteristics. * 3.3.1 Pressure resistance and functioning. Launchers shall with- stand the firing of one (1) G

35、overnment standested for and shall comply with the requirements for firing pin indent (see 3.2.3.7) and firing pin protrusion (see 3.2.3.8) after interchange of Fts using the test methods specified in 4.7.2.2 and 4.7.2.3 respectively, the launchers shall be examined for functioning of safety (see 3.

36、2.3.U) and shall be tested for safety actuation torque (see 3.2.3.ll.2, fun- ctioning (see 3.3.1), and targeting an accuracy (see 3.3.3) require- ments after interchange of parts using the test methods specified in 4.7.2.5, 4,T.b and 4.7.6 respectively. shall be allowed. requirements specified above

37、 shall be cause for rejection of the repre- sented lot. A sample of 20 launchers from each retest or reconditioned lot shaU be tested wing the test procedures specified above. In addition, No malfunctions or failures Failure of any launcher to pass any of the tests or 10 Provided by IHSNot for Resal

38、eNo reproduction or networking permitted without license from IHS-,-,-* 4.5.3.8.1.1.1 The ten launchers selected for the interchangeability test shall be subjected tQ the breech insert removal test using the test method specified in 4.7.7.1.1.1. the represented lot. Failure of the ten launchers to .

39、 meet the torque requirements of 3.2.3.5 shall be cause for rejection of * 4.5.3.8.1.2 Concurrent repair pasts. A sample of at least, five parks from eaoh inspection lot of concurrent repair parts shall be sub- Jetted to the interchangeability test specified in 4.7.7.1.2. Failure of any part to pass

40、 the interchangeability test shall be cause for re- jection of the represented lot of parts. A sample of 10 parts from each retest or reconditioned lot shaU be tested using the test procedures specified in 4.7.7.1.2. 4.5.3.8.2 Interplant. When launchers axe manufactured concurrently by more than one

41、 contractor, each contractor shall forwarrd monthly to a testing agency desigmte by the procuring agency, five launchers for the interpiant interchangeability test specified in 4.7.7.2 (see 6.1) . The launchers shall be tested for and shall comply with the requirements for firing pin hient (see 3.2.

42、3.7) and firing pin protrusion (see 3.2.3.8) before and after interchange of parts using the test methods specified in 4.7.2-2 and 4.7.2.3, respectively. In addition, the launchers shaU. be examined for functioning of the safety (see 3.3.3.11) qi shall be tested for safety actuation torque (see 3.2.

43、3.31.2), functioning (see 3.3.1), and targeting and accuracy (see 3.3.3) after interchange of pasts using the test methods specified in 4.7.2.5, 4.7.4 and 4.7.6 respectively. Parts shall be identified with their manufaaturer throughout the test. Before launchers are returned to the contractors, the

44、original parts shall be reassembled to their respecttve launchers an the launchers given a hand functioning test to assme proper operation. 4.5.3.9 Component part -g-.s.s-a. parts testigfi iiaw material test- ing, p however, such malfunctions shall be recorded. * 4.7.6 Fargetiing and accuracy test.

45、Testing shall be conducted from a bench rest position for the targeting and accuracy. complete with leaf sight assembly, and the sights set as specified in 3.3.3, a 20 round group shall be fired at a range of 200 meters using an Arm;y “A“ type target. recorded. error (range and deflection), and cene

46、er of impact of the 20 round group shall be determined wtthin the limits specified. conducted with wind conditions not exceeding 10 miles per hour. The launcher, The range and deflection of each round shall be The standaxfi deviation (range and deflection), the probable All firing shall be 4.7.7 Int

47、erchangeability test. 4.7.7.1 In plant. 4.7.7.1.1 Launchers. Launchers shall be tested for interchange- ability of pwts by disassembling and then reassenibling pmts using the parts and prearranged system prescribed below. Interchange of parts shall be accomplished by dividing the parts of each launc

48、her into 10 groups of nonmating parts, distributing the groups into 10 different trays until each tray contains a complete launcher. Groups of ms from launcher number 1 shall be taken in order and placed in trays 1 through 10; groups of parts from launcher number 2 shall be taken in order and pac gr

49、oups of parts from launcher number 3 shall be taken in order and placed trays 3 through 10 to 2, etc. Comercial parts such as screws, nuts, washers, and pins shall be paced in the same tray as their mating or associated part. comercial part rendered unserviceable by disassembly shall be replaced without penalty to the interchanseability test. The launchers shall be reassembled using only those parts trhich axe in the s