All About Handgun Actions: Single & Double Action

Roy Huntington, editor of American Handgunner magazine, explains the fundamental differences between single-action and double-action handgun mechanisms. He demonstrates how both revolvers and some semi-automatic pistols, like the Sig P225, operate in these modes, detailing the trigger pull's function in each.

Quick Summary

Roy Huntington explains that double-action means the trigger pull cocks and fires the hammer, while single-action means the hammer is pre-cocked and the trigger pull only releases it. Semi-automatic pistols can operate in both modes, with the slide cycling re-cocking the hammer for single-action follow-up shots.

Chapters

  1. 00:05Introduction by Roy Huntington
  2. 00:10Topic: Handgun Actions
  3. 00:20Example: Sig P225
  4. 00:22Safety Check: Clearing the Firearm
  5. 00:31Hammer Cocked State
  6. 00:36Hammer Drop Feature
  7. 00:40Double Action Mode Explained
  8. 00:54Slide Cycling and Hammer Cocking
  9. 00:58Single Action Mode Explained
  10. 01:12Returning to Double Action Mode
  11. 01:22Double Action Trigger Pull Functions
  12. 01:27Other Handgun Actions
  13. 01:40Conclusion and Thanks

Frequently Asked Questions

What is the difference between single-action and double-action handgun triggers?

In double-action mode, pulling the trigger cocks and then releases the hammer to fire the gun. In single-action mode, the hammer is already cocked, and the trigger pull only releases it, typically resulting in a lighter pull.

Can semi-automatic handguns operate in double-action mode?

Yes, many semi-automatic handguns, like the Sig P225 demonstrated, can operate in double-action mode. The first trigger pull cocks and fires the hammer, and subsequent shots are in single-action mode after the slide cycles and re-cocks the hammer.

How does a semi-automatic handgun return to double-action mode?

A semi-automatic handgun returns to double-action mode if the hammer is manually lowered or dropped after being cocked. This requires a longer, heavier trigger pull to cock and release the hammer for the next shot.

What are the common types of handgun actions?

The most common handgun actions are single-action and double-action. Many firearms are a combination of both. Striker-fired systems are also prevalent and function similarly to single-action after the initial cocking.

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