Double action

Common card · No. 306706

Double action (or double-action) refers to one of two systems in firearms where the trigger both cocks and releases the hammer. Double-action only (DAO) firearms trigger: The trigger both cocks and releases the hammer. There is no single-action function and the hammer will return to its decocked position after each shot. Double Action Kellerman (DAK): A variant of traditional double-action used on certain SIG Sauer semi-automatic pistols. DAK triggers have a long stroke with 29 N (6.5 lbf) pull. However, if a user shooting under stress short-strokes the trigger by only releasing it halfway, the trigger will reset, but with a 38 N (8.5 lbf) pull. This temporary increased trigger pull is intended to prevent negligent discharges. Double-action – firearms trigger: Pressing the trigger 1) cocks, and 2) drops the hammer. The hammer can also be cocked to fire in single-action (SA) mode. With a DA revolver, the hammer can be cocked first (single action), or the trigger can be pulled and it...

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