Trigger (firearms)

（重定向自Trigger pull）

Trigger mechanism in a bolt-action rifle.

The double-crescent trigger on the MG 34, which enabled select fire capability without using a selector switch. Pressing the upper segment of the trigger produced semi-automatic fire, while holding the lower segment of the trigger produced fully automatic fire.

A trigger is a mechanism that actuates the firing sequence of a firearm or crossbow; a trigger may also start another mechanism such as a trap or a quick release. A small amount of energy applied to the trigger causes the release of much more energy.

单词	Trigger pull
释义	Trigger pull 英语百科 Trigger (firearms) （重定向自Trigger pull） A trigger is a mechanism that actuates the firing sequence of a firearm or crossbow; a trigger may also start another mechanism such as a trap or a quick release. A small amount of energy applied to the trigger causes the release of much more energy.
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