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|  MIL-S-3443G (AR)
air cooling during the cleaning cycle is permitted. Disposition
of endurance tested shotguns shall be as specified in the
Endurance tested shotguns may be procured at the end
contract.
item contract price and shall not be counted as part of the
deliverable quantity required by contract (see 6.2).
Shotguns shall be tested
4.6.6 Interchangeabilitv test.
for interchangeability of repair parts (see 3.18) by disassem-
bling the shotguns and placing parts of each kind in the same
The ten shotguns shall then be reassembled using
container.
repair parts taken at random from each container and subjected to
the functioning test of 4.6.3 and the headspace test of 4.6.2.
4.6.7 Rough handlinq. After completion of the performance
test, three weapons shall be chosen and subjected to the rough
Each weapon will have the safety "on", a primed
handling test.
cartridge case in the chamber and a fully loaded magazine. One
weapon shall be conditioned at -20F, one at ambient and one at
+120F for a minimum of four hours prior to the test. The
weapons shall be dropped a minimum distance of four feet (lowest
point on the weapon to the drop surface) in each of the following
five modes: butt end down, right side down, left side down, top
side down, and 45 degree angle with vertical Plane - butt end
The drop surface shall be 85 + 5 Durometer (Shore A)
down.
rubber mat, one inch thick, backed by concrete. At the test's
conclusion, the weapon must be safe and serviceable and the
primed shell shall not have fired.
4.6.8 Chemical resistance. One sample of each plastic
material shall be submerged in each chemical listed in 3.17.7 for
24 hours at ambient temperature. The samples shall be removed,
rinsed, dried, and visually and manually inspected. No sample
shall display softening, checking, deformation or other adverse
effects.
4.6.9 Heat shield effectiveness. Type I shotguns shall be
tested for heat shield effectiveness (see 3.3.2.e). The shotgun
and its ammunition shall be conditioned at 78F 8F for a
minimum of 4 hours. Then 25 rounds of standard, commercial, 12-
gauge, 2 3/4-inch, 00 buckshot (9 pellets) maximum load shells
shall be fired in not more than 3 minutes (rate of fire is to be
Immediately after com-
approximately 1 shot every 5 seconds).
pletion of the firing, the temperature of representative areas of
the exterior of the heat shield shall be measured. No measure-
ment shall exceed initial temperature plus 40F. Areas to be
measured and measuring equipment used shall be approved by the
Government representative. At the discretion of the contractor,
this test may be performed in conjunction with the endurance test
(4.6.5).
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