What is the Difference Between Single Action and Double Action?

The main difference between single-action (SA) and double-action (DA) firearms lies in how the trigger operates and the number of actions it performs when pulled. Here are the key differences:

Single-Action (SA):

• The trigger performs only one action: releasing the hammer, which in turn fires the cartridge in the chamber.
• Must be cocked manually prior to each shot.
• Examples include most modern revolvers and some semi-automatic pistols.

Double-Action (DA):

• The trigger performs two actions: cocking and then firing the gun.
• Can be fired more rapidly compared to single-action firearms.
• Examples include double-action revolvers like the Smith & Wesson Model 10 or Ruger GP100, and some semi-automatic pistols like the SIG P226.

Some firearms also feature a double-action/single-action (DA/SA) trigger, which allows the user to fire the first shot in double-action mode and subsequent shots in single-action mode. The choice between single-action and double-action firearms depends on factors such as ease of use, accuracy, and personal preference.

Comparative Table: Single Action vs Double Action

The main difference between single-action and double-action guns lies in the trigger pull and the actions performed when the trigger is pulled. Here is a table highlighting the key differences between single-action and double-action guns:

In summary, single-action guns require the shooter to manually cock the hammer before each shot, resulting in a lighter and more consistent trigger pull. In contrast, double-action guns automatically cock the hammer as the shooter pulls the trigger, resulting in a heavier and less consistent trigger pull but faster shooting.