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|  MIL-S-63348A(AR)
4.7.8.4.1 Uncontrolled fire. During the interrupted burst
firing, weapon shall be checked to assure that firing stops
immediately when the trigger is released (uncontrolled fire shall be
recorded as a malfunction).
4.7.8.4.2 Parts.
No parts shall be altered during the test.
Broken parts that effect function and those parts that are worn to
the extent they are unserviceable (se 6.5) shall be replaced. The
contractor shall provide replacement parts as required to complete
the test at no additional to the Government.
*
4.7.8.4.3 Magnetic particle inspection. Upon completion of the
10,200 round endurance test, the bolt, bolt carrier, cam pin, and
extractor from each weapon shall be magnetic particle inspected in
accordance with 4.7.4.3.
4.7.8.4.4 Analysis.
When either a malfunction occurs or a
weapon fails to meet a test requirement, a failure analysis shall be
performed to determine the causes. The failure analysis shall
include dimensional and physical tests. Components shall not be
disassembled from the weapon for inspection and test unless
determined necessary..
4.7.8.4.5 Recording of data. The following data shall be
recorded:
a.
Inspection lot number.
Weapon serial numbers
b.
Each malfunction and unserviceable part (see 6.5).
c.
1. Weapon round at which it occurred.
2. Weapon serial numbers.
3. Type of firing (automatic or burst)
4. Class of malfunction.
Ammunition lot number.
d.
Headspace measurement.
e.
f.
Each rate of fire measurement with identification of which
cycle.
Each ammunition defect.
g.
h.
The cause of each weapon failure.
If applicable, cause of test failure.
i.
4.7.8.5 Failure of endurance test. Failure of weapons to meet
the endurance test requirements shall be cause for deferring further
submission of product until the following have been accomplished and
the subsequent resubmittal for endurance testing, as specified in
Table IV, has been successfully completed.
4.7.8.5.1 Examination.
The contractor shall examine the
non-conforming weapons by performing a dimensional, physical, and
visual examination, as required, of the weapon and magazine
component that are suspected to be the cause of the test failure.
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