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|  MIL-L-45589
3.8.2 Welding and brazing. Welding and brazing shall be in accord-
ante with the applicable drawing. Interpretation of welding symbols de-
pitted on the applicable drawings shall be as defined in AWS A2.O.
3.8.3 Threads. Threads shall conform to the thread series and class
indicated on the applicable drawing and in accordance with MIL-STD-9.
3.8.4 Identification. Marking of launchers, including application
of part numbers, shall be as indicated on the applicable drawing and
in accordance with MIL-W-13855. Serial numbers shall be furnished by
the procuring activity.
3.9 Performance and product characteristics.
3.9.1 Safety.
3.9.1.1 Functioning of safety. When the barrel is locked in safety
position and the trigger is in the normal forward position, the safety
shall be movable between the "safe" and "fire" positions and shall remain
in the position set under spring action of the safety spring plunger
until reset manually. When the safety is positioned forward, so that
the letter "F" is completely uncovered and the hammer is cocked, the
hammer shall release as the trigger is pulled. When the safety is positioned
rearward, so that the letter "S" is completely uncovered, the safety bar
shall restrict trigger movement and prevent firing of the launcher. When
the safety is in "fire" position, rotating the latch to any point where
the latch permits the launcher to open shall cause the safety to move
to the "safe" position.
3.9.1.2 Safety actuation force. The force required to move the
safety from the safe position to the "fire" position shall be not greater
than 16 pounds, nor less than 4 pounds, when tested as specified in
4.4.3.1 and 4.5.7.
3.9.1.3 Sear safety. The difference between the maximum vertical
movement of the sear during cocking of the hammer and the maximum vertical
movement of the sear, when the trigger is pulled with the hammer cocked
and the safety in the "safe" position, shall be not less than 0.026 inches
at datum -A- shown on Drawing F7790600, when tested as specified in
4.4.3.1 and 4.5.8.
3.9.2 Hammer. The hammer shall pivot on the hammer pin through its
full range of travel without binding. When the launcher is fully opened,
the hammer shall move to the cocked position by action of the cocking arm
on the cocking lever and shall be held in the cocked position by engagement
with the sear. When the safety is set in "fire" position, the hammer shall
disengage from the sear as the trigger is pulled and move under spring
action to actuate the firing pin. After actuating the firing pin, the
hammer shall be returned to, and be held in, its normal forward position by
spring action on the sear, permitting the firing pin nose to return to its
retracted Position, flush with, or below, the breech face.
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