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Page Title:
Trigger sear and secondary sear test |
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|  MIL-L-45935A
AMENDMENT 3
PAGE 14
Add paragraph 4.7.2.6 as shown below:
"4.7.2.6 Triqger sear and secondary sear test. Launchers
shall be tested for trigger sear and secondary sear requirements
(see 3.2.3.4) utilizing inspection equipment in accordance with
drawing F11836899 and Cartridge, 40MM, XM387B2 (Dummy, Completely
Inert). With the launcher mounted to the fixture, the barrel
latch shall be depressed and the launcher barrel exercised to
cock the launcher with the left hand. Partial trigger pull
shall be evenly applied to the trigger by the index finger of
the right hand until movement of the trigger occurs without
releasing the firing pin. The trigger shall then be released.
The trigger shall return to the original position under spring
action after partial trigger pull. The trigger will then be
pulled to cause the firing pin to fall. The launcher shall
then be opened in the manner previously cited and a fired
cartridge case inserted into the breech of the barrel. The hook
of the fixture will be placed over the trigger and 20 lb.
pressure applied to depress the trigger. The barrel will then
be moved to the closed position, left hand on the hand guard at
a speed to simulate actual loading and firing of 5 to 10 rounds
per 2 minutes. When the barrel is closed, the firing pin shall
be retained by the secondary sear until the trigger is released
and allowed to return to its forward position. When the trigger
is pulled with the index finger of the right hand, the firing
pin shall fall."
*
Delete 4.7.2.6 and Substitute:
"4.7.2.6 Trigger sear and secondary sear test. Launchers
shall be tested for trigger sear and secondary sear requirements
(see 3.2.3.4) using inspection equipment in accordance with
drawing F11835899 and 40mm functional test plug, P/N 12937951.
With the launcher mounted to the fixture, the barrel latch shall
be depressed and the launcher barrel exercised to cock the
launcher with the left hand. Partial trigger pull shall be
evenly applied to the trigger by the index finger of the right
hand until movement of the trigger occurs without releasing the
firing pin. The trigger shall then be released. The trigger
shall return to the original position under spring action after
partial trigger pull. The trigger pull will then be pulled to cause
the firing pin to fall. The launcher shall be opened in a
manner previously cited and the 40mm functional test plug
inserted into the breech of the barrel. The hook of the fixture
will be placed over the trigger and 20 lb. pressure applied to
depress the trigger. The barrel will then be moved to the
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