Manual

SECTION 4'
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FUNCTION
A Colt MK IV/Series 80 and 90 semi-automatic pistol is ready to fire when a
loaded magazine is inserted into the pistol, the slide pulled back to cock
hammer, and released to travel forward and feed a round from the magazine
into the chamber. Final forward slide movement locks barrel and slide together
and deactivates disconnector.
When the pistol is grasped, the grip safety is released so that trigger may now
be squeezed. When the trigger is squeezed the trigger bar lever acts on the
plunger lever to disengage the firing pin lock just before the sear disengages
from the hammer. The hammer pivots forward under the force of the mainspring
to strike the rear of the firing pin. The firing pin is driven forward to strike primer
in base of cartridge.
The energy imparted to the primer ignites it; the primer in turn ignites the
main powder charge which, in burning, rapidly generates extremely high gas
pressure to drive the bullet down the barrel. Rifling grooves in the barrel
impart stabilizing spin to the bullet so that it will follow a more accurate path to
the target when it leaves the muzzle.
Force rearward on the slide breech face starts slide and barrel on their
rearward travel; however, the slide unlocks from the barrel only after gas
@)
SAFETY DEPENDS ON YOU