How the AR-15 Trigger Works

Published on October 5, 2013
Duration: 5:18

This video provides a detailed explanation of the AR-15 fire control group, including the hammer, trigger, disconnector, and safety selector. It covers the mechanics of sear engagement, hammer reset, and the function of the safety selector. Visuals include cutaway views and exploded component diagrams, demonstrating how these parts interact during the firing cycle.

Quick Summary

The AR-15 fire control system includes the hammer, trigger, disconnector, and safety selector. The hammer spring provides tension, and sear engagement locks the hammer. The disconnector ensures trigger reset, while the safety selector physically blocks the trigger's movement when engaged.

Chapters

  1. 00:00Introduction to AR-15 Fire Control
  2. 00:28Component Identification
  3. 00:51Spring Tension and Mechanics
  4. 01:34Sear Engagement and Firing
  5. 02:46Trigger Reset and Disconnector
  6. 03:28Safety Selector Function

Frequently Asked Questions

What are the main components of the AR-15 fire control system?

The AR-15 fire control system includes the hammer, hammer spring, trigger, trigger spring, disconnector, disconnector spring, hammer and trigger pins, and the safety selector switch. These parts work together to control the firing sequence of the rifle.

How does the AR-15 trigger mechanism reset?

After firing, if the trigger is held back, the disconnector catches the hammer. When the trigger is released, the disconnector allows the hammer to fall forward onto the disconnector, resetting it for the next shot.

What is the function of the AR-15 safety selector?

The AR-15 safety selector has a half-round shaft. In the 'safe' position, the solid part of the shaft blocks the trigger from moving. In the 'fire' position, a cutout aligns, allowing the trigger to be pulled and the rifle to fire.

What role does the hammer spring play in the AR-15 trigger system?

The hammer spring provides the force needed to drive the hammer forward. It rests on the trigger pin and its tension is crucial for igniting the primer when the hammer is released.

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