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|  MIL-M-45013E (AR)
one-half the diameter of the firing pin point as evidenced by
visual examination. Failure of any machine gun in the sample to
meet the requirements shall cause rejection of the represented
lot and a failure analysis (see 6.2) performed by the contractor.
4.4.3.2.2 Trigger pull. Failure of a machine gun to meet
the trigger pull requirement (3-4.3) shall cause rejection Of the
represented lot and a failure analysis (see 6.2) performed by the
contractor.
4.4.3.3 Hiqh pressure resistance, functioning, and targeting
and accuracy firing testing. The contractor shall test each
machine gun for high pressure resistance functioning, and
targeting and accuracy with its assigned and spare barrel
assembly with its biped assembly using the test methods specified
in 4.5.4, 4.5.5, 4.5.6, respectively. A maching gun failing to
meet any of the requirements shall be rejected and a failure
analysis (see 6.2) performed. The contractor shall test five
machine guns from each inspection lot for functioning with the M4
Bandoleer, using the test methods specified in 4.5.5.2. Failure
of any machine gun in the sample to meet the requirements shall
cause the rejection of the represented lot and a failure analysis
(see 6.2) performed by the contractor.
4.4.3.4 Interchangeability testing.
4.4.3.4.1 In plant.
4.4.3.4.1.1 Machine guns. Ten machine guns with only the
assigned barrel assembly with biped assembly, selected by the
Government representative from each inspection lot shall be
tested by the contractor for interchangeability testing and shall
have been found satisfactory in all other examinations and tests.
Test frequency may be reduced to not less than one test of ten
machine guns each month when a record of consistently
satisfactory results has been established. The ten machine guns
shall be tested for and shall comply with the requirements for
headspace, firing pin indent, and trigger pull before and after
interchange of parts using the test methods specified in 4.5.1.
4.5.2, and 4.5.3, respectively. In addition, the machine guns
shall be tested for functioning and targeting and accuracy
requirements after interchange of parts using the test methods
specified in 4.5.5 and 4.5.6. No failures shall be allowed in
the function firing test. Targeting results shall be recorded
and shall not be basis for rejection and the sights shall not be
adjusted. At the completion of the interchangeability test, the
barrel assembly with biped assembly shall be reassembled to the
original machine gun. Failure of the interchangeability test
shall cause retest or rejection of the represented lot and a
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