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|  MIL-B-70511B (AR)
burst. With the M16A2, all firings shall be in three-round
bursts.
4.5.2.2 Function (lot acceptance). The M2 Bolt shall be
functioned tested for lot acceptance in accordance with the
following table:
FUNCTION (LOT ACCEPTANCE)
No. of
Type of
Mode of
No. of
Weapon
Bolts
Fire
Rounds/Bolt
15
M16
Semi
30
15
M16
Auto
30
15
M16A1
Semi
30
15
M16A1
Auto
30
15
M16A2
Semi
30
15
M16A2
Burst
30
4.5.3 Cyclic rate. Thirty (30) rounds shall be fired full
automatic from a 30 round maqazine with the M16A1 rifle
cyclic rate shall be recorded for the full 30 rounds. All
malfunctions shall be recorded.
4.5.4 Endurance. To M16A2 rifles shall be used for each M2
Bolt tested. The M2 Bolt shall be inserted in a Government
approved M16A2 rifle and fired from a Government approved test
stand. A total of 10,000 rounds shall be fired on each M2 Bolt.
A cycle shall consist of firing seven 30 round magazines for a
total of 210 rounds. The M2 Bolt shall then be inserted in the
second M16A2 rifle and the cycle repeated. After every 5 cycles,
the M2 Bolt shall be cleaned and inspected using magnetic
particle inspection and lubricated. Any cracked or broken bolt
(DWG No. 11833495) shall result in failure of the endurance test.
If there are any other broken parts, they shall be replaced. The
M16A2 rifle shall be cleaned and lubricated. Any broken or
damaged parts shall be replaced. The M2 Bolt shall be removed
from the M16A2 and placed in a M16A1 for cyclic rate measurement
on the second magazine of the first cycle and on the second
magazine of every fifth cycle. The cyclic rate of fire shall be
measured when tested from a M16A1 Rifle in accordance with 4.5.3.
All malfunctions shall be recorded. Lubricant conforming to MIL-
L-63460 shall be used. If 128 or more malfunctions occur that
are attributable to the M2 Bolt, the sample shall be rejected.
4.5.4.1 Cleaning and lubrication. Rifles shall be
lubricated as specified below at the beginning of the test and
after the third cycle in every 5 cycle increment. Rifles shall
be cleaned and lubricated at the end of every 5 cycles. No other
cleaning and lubrication shall be performed during this test. At
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