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|  MIL-L-45403D
4.5.5 Dynamic test. The sample links shall be tested by assembling the
links into 100 round belts using 7.62MM NATO approved dummy cartridges in
accordance with Drawing C11836917 or C10522688. The test fixture specified on
Drawing F11836906 shall be rigidly secured with the two mandrels in-the same
horizontal plane. The end of the belt with the free front and rear loops
shall be placed on the fixed mandrel with the cartridge bases facing toward
the operator. The free mandrel shall be place through the block bushing and
middle link loop of the remaining end of the belt. Assuring no movement of
the belt prior to the test, the free end of the belt shall be allowed to drop
freely by releasing the free mandrel.
4.5.6 Loop gap position test. The sample links shall be tested by
placing the links on a hard flat surface with the openings down. Plane F-F,
as shown in Drawing F7268389, shall be held firmly on surface and points D nor
E shall not touch surface. The process shall be repeated by firmly holding
plane J-J on surface and points G & H shall not touch the surface.
4.5.7 Function test. A sample of 500 1 inks shall be taken and tested by
the testing agency for functioning requirements (see 3.2.5). The links shall
be assembled into 100 round belts using NATO approved 7.62MM cartridges and
fired in bursts of 10 to 20 rounds each as follows:
a.
An unsupported, linked belt shall be fired through an M60 machine
gun.
b. A linked belt shall be fired through an M134 automatic gun using
a feeding system simulating the M21 armament subsystem application.
c. A linked belt shall be fired through an M219 machine gun having a
feeding system simulasting an M60 tank installation (left-hand feed).
d. A linked belt shall be fired through an M240MG (right-hand feed)
with feeding system simulating an M2 Bradley Fighting Vehicle installation.
e. A linked belt shall be fired through an M240MG (left-hand feed)
with feeding system simulating an M60A1 Tank installation.
4.5.8 Accelerated corrosion testing. Sample links shall be tested for
corrosion resistance of the applied protective coating using either the salt
spray (fog) test or the Springfield Immersion test specified in MIL-P-16232.
4.5.9 Hardness testing. Sample links shall be taken from each heat treat
lot (see 4. in accordance with MIL-STD-105, using inspection level S-4
and tested for hardness using the test method specified in ASTM Method E 18.
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