220.127.116.11 Cartridge locator test. With the barrel assembly not
assembled to the receiver, a force shall be applied to the rear end
of the cartridge locator, parallel to the axis of the barrel. The
force required to deflect the cartridge locator to within flush position
plus .020 inches of the barrel face shall be measured and shall conform
within the limits specified.
4.7.2 Receiver group.
18.104.22.168 Cartridge ejector test. With barrel assembly not assembled
to the receiver, a force shall be applied to deflect the cartridge ejector
pinto within flush plus .020 inch of the breech face shall be measured
and shall conform within the limits specified.
22.214.171.124 Firing pin indent test. Launchers shall be tested for
firing pin indent using Government approved inspection equipment. The
launcher shall be held in a vertical position with muzzle down, the
launcher opened, and the copper compression cylinder holding fixture
containing the copper compression cylinder, Drawing B8440920, inserted
in the barrel chamber. The launchers shall then be closed, the safety
set in the fire position, and the trigger pulled to release the firing
pin and indent the copper cylinder. The holding fixture shall then be
removed from the launcher and the depth of the indent in the copper
pressure cylinder computed by measuring the distance from the original
surface of the copper cylinder (before indentation) to the bottom of
the firing pin impression. If the indent is not within the requirements,
three more impressions shall be taken and the average depth of the
three indents of each test shall be within the requirements for accep-
tance. All firing pin indent impressions shall not be off center more
than one-half the diameter of the firing pin point.
126.96.36.199 Firing pin protrusion test. Launchers shall be tested for
firing pin protrusion using Government approved inspection equipment.
188.8.131.52 Trigger pull test. Launchers shall be tested for trigger
pull using Government approved inspection equipment. The launcher shall
be cocked, the safety shall be in the "fire" position, and the launcher
shall be in the vertical position with the stock assembly down when each
load is applied. The load shall be applied gradually to the trigger and
exerted in a line parallel to the axis of the barrel bore by a slow
steady lift of the launcher. When the minimum load is applied the firing
pin shall not release, and when the maximum load is applied the firing
pin shall release. The trigger pull shall also be tested for creep by
applying pressure manually to the trigger at a unifom rate of increase
over a period of not-less than three seconds.