How to Install or Remove any Mil Spec Type Trigger

Published on April 5, 2023
Duration: 11:09

This guide details the process of installing and removing mil-spec triggers in an AR-15 lower receiver, excluding drop-in types. It covers essential preparation, tool usage for alignment, and step-by-step instructions for trigger, disconnector, hammer, safety selector, and grip installation. A crucial function check ensures proper safety and firing operation, with a clear outline for the reverse removal process.

Quick Summary

To install a mil-spec AR-15 trigger, use a punch tool for alignment while assembling the trigger, disconnector, and springs. Insert the trigger pin from the left, then install the safety selector, grip, and hammer. Finally, perform a function check to ensure safe operation on 'Safe' and correct function on 'Fire'.

Chapters

  1. 00:00Introduction to Mil-Spec Triggers
  2. 00:42Preparation and Tools Needed
  3. 01:14Trigger and Disconnector Installation
  4. 02:59Inserting the Trigger Pin
  5. 04:04Safety Selector and Grip Installation
  6. 05:38Hammer Installation Guide
  7. 07:38Performing the Function Check
  8. 08:11Step-by-Step Trigger Removal

Frequently Asked Questions

What tools are needed to install a mil-spec AR-15 trigger?

You'll need a punch tool for aligning trigger and hammer pin holes, a hammer (or similar tool) for driving pins, and potentially a screwdriver for the pistol grip screw. Ensure your lower receiver is stripped down to the buffer tube before starting.

How do you ensure the trigger and disconnector springs are correctly installed?

During installation, use a punch tool inserted from the right side to hold the trigger and disconnector in place. This captures the springs before you insert the trigger pin from the left, ensuring proper tension and function.

What is the critical function check after installing an AR-15 trigger?

After installation, perform a safety check. Ensure the trigger cannot be pulled when the selector is on 'Safe'. Then, move the selector to 'Fire' and confirm the trigger functions correctly, including a proper reset after cycling the action.

What is the first step in removing an AR-15 mil-spec trigger?

To remove a mil-spec trigger, you must first remove the pistol grip and the safety selector assembly. This typically involves removing the grip screw, then the safety selector detent and spring, allowing the selector to be removed.

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