AR15 Function Checks

Published on October 1, 2018
Duration: 8:21

This guide details essential function checks for an AR-15, emphasizing safety and mechanical reliability. It covers the 'Motion and Movement' (M&M) drill to identify loose accessories and internal noises, fire control group checks including trigger reset and safety engagement, and operational checks of the bolt catch and magazine release. Performing these checks regularly helps ensure the firearm is safe and operational.

Quick Summary

AR-15 function checks ensure mechanical reliability and safety. Key checks include the 'Motion and Movement' drill for accessories, fire control group tests for trigger and safety engagement, and verifying the bolt catch and magazine release operations.

Chapters

  1. 00:00Introduction to AR-15 Function Checks
  2. 00:24Meet the Instructor & Video Overview
  3. 00:54Importance of Function Checks
  4. 01:14Safety First: Unloading the Firearm
  5. 01:26What is a Function Check?
  6. 01:36The M&M (Motion & Movement) Function Check
  7. 01:49Checking for Normal Noises
  8. 02:34Checking Accessories for Looseness
  9. 03:40Checking the Safety Selector
  10. 04:09Checking the Castle Nut & Stock
  11. 04:53Fire Control Group Function Checks
  12. 05:05Safety Selector & Trigger Interaction
  13. 05:15Trigger Reset Check
  14. 05:31Safety Manipulation with Trigger Held
  15. 05:51Cycling the Action Check
  16. 06:05Locking Bolt Back and Releasing
  17. 06:24Magazine Function Checks
  18. 06:29Magazine Catch & Release Test
  19. 06:51Bolt Catch with Empty Magazine
  20. 07:02Summary of Function Checks
  21. 07:39Conclusion & Further Questions

Frequently Asked Questions

What is the primary purpose of performing function checks on an AR-15?

Function checks on an AR-15 are crucial for ensuring the firearm's mechanisms are operating correctly and safely. They help identify potential issues like loose accessories, faulty trigger engagement, or problems with the bolt catch and magazine release before live firing.

What is the 'Motion and Movement' (M&M) function check for an AR-15?

The M&M check involves closing the bolt on an empty chamber and then listening for normal operational noises while gently manipulating the rifle. It also includes physically checking all bolted-on accessories, such as optics and handguards, for any signs of looseness or play.

How do you check the fire control group and safety selector on an AR-15?

With the safety on, the trigger should not fall. With the safety off, the hammer should fall. Holding the trigger back, cycling the action, and then releasing the trigger should produce an audible reset. Manipulating the safety while holding the trigger back should not reset the trigger.

What should I look for when checking the bolt catch and magazine release on an AR-15?

The bolt catch should reliably hold the bolt to the rear when an empty magazine is inserted. The magazine release should allow magazines to drop freely when pressed, but the magazine catch should prevent accidental release when the magazine is tugged.

Related News

All News →

More Training & Techniques Videos You Might Like

More from UN12 Magazine

View all →