Double-Action


A firearm mechanism where pulling the trigger cocks and then releases the hammer (common in some revolvers and pistols).

Related Terms

Trigger Pull


The amount of force needed to fire a shot; heavier or inconsistent triggers can reduce accuracy.


View Term: Trigger Pull

Handgun


A short-barreled firearm (pistol or revolver) designed for one-handed operation; often requires s...


View Term: Handgun

Sear


The component in a firearm’s trigger group that holds the hammer or striker back until the trigge...


View Term: Sear

Cylinder (Revolver)


The rotating part of a revolver holding multiple chambers of ammunition, advancing with each hamm...


View Term: Cylinder (Revolver)

Auto-Indexing (Revolver)


A revolver feature where cocking the hammer or pulling the trigger automatically rotates the cyli...


View Term: Auto-Indexing (Revolver)

Single-Action


A firearm mechanism in which the hammer must be manually cocked before the trigger can release it...


View Term: Single-Action

Semi-Automatic


A firearm action where each trigger pull fires a single shot and automatically chambers the next ...


View Term: Semi-Automatic

Trigger Discipline


Keeping one’s finger off the trigger until the moment of firing; a cornerstone of firearms safety...


View Term: Trigger Discipline

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