The Rise and Fall of the Double Action Semi-Auto

Published on May 5, 2016
Duration: 5:17

This video provides an expert overview of double-action/single-action (DA/SA) semi-automatic pistols, explaining their mechanical operation, historical significance, and reasons for their decline and recent resurgence. Instructor Chris Baker details the DA/SA trigger mechanism, the function of the decocking lever, and emphasizes the importance of training the decocking reflex for safety. The content highlights iconic DA/SA models and their adoption by military and law enforcement.

Quick Summary

Double Action/Single Action (DA/SA) pistols feature a two-stage trigger: the first pull is long and heavy, cocking and firing the hammer. Subsequent shots use a shorter, lighter pull as the slide cocks the hammer. While once popular, their complexity led to a decline against striker-fired designs, though premium models are seeing renewed interest.

Chapters

  1. 00:00Introduction to DA/SA Pistols
  2. 00:38Mechanical Operation Explained
  3. 01:35Historical Context: Walther PP & P38
  4. 02:28The Golden Age and Decline of DA/SA
  5. 03:13Challenges of the DA/SA Platform
  6. 04:16Modern Resurgence of DA/SA Pistols

Frequently Asked Questions

What is a Double Action/Single Action (DA/SA) pistol?

A DA/SA pistol has a trigger mechanism where the first shot requires a long, heavy pull to cock and release the hammer. Subsequent shots are fired with a shorter, lighter pull because the slide action has already cocked the hammer.

Why did DA/SA pistols decline in popularity?

DA/SA pistols saw a decline due to the rise of simpler striker-fired systems like Glocks and the enduring popularity of single-action 1911s. Their perceived complexity and steeper learning curve contributed to this trend.

What are the advantages of DA/SA pistols?

Historically, DA/SA pistols offered a safer carry method than 'cocked and locked' single-action firearms. They provide a heavy first trigger pull for safety and a lighter subsequent pull for faster follow-up shots.

Are DA/SA pistols still relevant today?

Yes, despite market shifts, DA/SA pistols are experiencing a niche resurgence. Companies like CZ, Sig Sauer, and Beretta offer premium, semi-custom versions of classic designs, appealing to enthusiasts who appreciate their unique operation.

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