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MIL-G-45140B
4.6.9.1.1. Guns. Guns shall be tested by disassembling and then re-
assembling parts using the parts and prearranged system specified below.
interchange of parts shall be accomplished by dividing the parts of each
gun into ten groups of nonmating parts as shown below and distributing
the groups into ten different trays until each tray contains parts for a
complete gun. Groups of parts from the first gun shall be taken in order
and placed in trays 1 through 10; groups of parts from the second gun
shall be taken in order and placed in trays 2 through 10 to 1; groups of
parts from the third gun shall be taken in order and placed in trays 3
through 10 to 2, etc. Commercial parts such as screws, spring pins, etc.,
shall be placed in the same tray as their mating or associate part. Any
commercial part rendered unserviceable by disassembly shall be replaced
without penalty to the interchangeability test. The guns shall be re-
assembled using only those parts which are in the same tray. After
interchangeability testing, all original parts shall be reassembled to
their respective guns and given a hand functioning test to assure proper
operation.
Groups of Nonmating Parts
Group II
Group I
Receiver and barrel assembly
Bolt: Spotting rifle (7266340)
Pin, straight, headed (7266377)
(7268255)
Reglator gas (7790871)
Nut, regulator lock (7266831).
Release, sear (7267838)
Spring, helical, torsion
Spring, helical, compression
(7266417)
(7266416)
Group IV
Group III
Nut, plain round (7266830)
Buffer assembly (7266342)
Magazine assembly (12003046)
Housing and catch assembly
Rod, guide (7267851 )
(7268118)
Spring, sear release (7266422)
R&actor, firing pin (7266400)
Group V
Group VI
Catch assembly, buffer (7266348)
Bushing, regulator (7266833)
Pin, housing, front (7266497)
Pin, hammer (7266374)
Retainer, sear release (7266399 )
Rod operating, assembly (7267859)
Spring, helical, compression
(7266420)
20

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