Double and Single Action Revolvers Explained

Published on December 23, 2023
Duration: 0:59

This guide explains the fundamental differences between single-action and double-action (DA/SA) firearm mechanisms, using examples like the Heritage Rough Rider and Diamondback Sidekick revolvers. It details how trigger pulls operate in each mode and extends the concept to hammer-fired semi-automatic pistols such as the Sig Sauer P226, including the function of a de-cocker. The instruction is delivered with high authority and professional clarity.

Quick Summary

Single-action revolvers require manual hammer cocking for each shot, with the trigger solely releasing it. Double-action revolvers allow the trigger to both cock and release the hammer, enabling faster follow-up shots with a heavier initial pull. DA/SA semi-automatic pistols, like the Sig P226, can operate in either mode, with a de-cocker facilitating a safe transition to double-action for the first shot.

Chapters

  1. 00:00Single Action Revolvers Explained
  2. 00:22Double Action/Single Action Revolvers Explained
  3. 00:40DA/SA in Semi-Automatic Pistols

Frequently Asked Questions

What is the difference between single action and double action revolvers?

Single-action revolvers require the hammer to be manually cocked for each shot, with the trigger only releasing it. Double-action revolvers allow the trigger to both cock and release the hammer, enabling a faster follow-up shot but with a heavier pull.

How does a DA/SA semi-automatic pistol work?

In a DA/SA semi-automatic pistol, racking the slide cocks the hammer for a single-action pull. A de-cocker can safely lower the hammer, requiring a longer double-action pull for the first shot, after which subsequent shots will be single-action.

What is the benefit of a de-cocker on a pistol?

A de-cocker on a hammer-fired pistol safely lowers the hammer from a cocked position without firing the weapon. This allows the firearm to be carried with the hammer down, requiring a double-action pull for the first shot, which can be a safety feature.

Can a single-action revolver be fired without cocking the hammer?

No, a traditional single-action revolver cannot be fired without manually cocking the hammer first. The trigger in a single-action mechanism only performs the function of releasing the hammer once it is cocked.

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