device consisting of a piece of machinery; has moving parts that perform some function

a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)

a lever (as in a keyboard) that actuates a mechanism when depressed

device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like

the action that ignites the charge in a firearm

the driving and regulating parts of a mechanism (as of a watch or clock)

action consisting of a system of levers that move a felt hammer to strike the strings when a key is depressed

action mechanism in a modern rifle or shotgun; a back and forward motion of a sliding lever ejects the empty shell case and cocks the firearm and loads a new round

In firearms terminology, the mechanism that handles the ammunition (loads, locks, fires, and extracts the cartridges).

a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)

a lever (as in a keyboard) that actuates a mechanism when depressed

device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like