Quick Tip: Mounting M-LOK Accessories Next to the Gas Block

Published on February 22, 2023
Duration: 4:41

This quick tip from Brownells addresses a common mistake when mounting M-LOK accessories on AR-15 handguards, specifically near the gas block. Improper mounting can cause the accessory to press against the gas block, creating tension on the barrel and significantly degrading firearm accuracy. The solution involves ensuring the accessory is mounted in a slot that allows the barrel to remain free-floated, or, if necessary, modifying the accessory's mounting screw.

Quick Summary

Mounting M-LOK accessories too close to an AR-15 gas block can cause interference, pressing against the barrel and degrading accuracy. Ensure accessories are mounted in slots that allow the barrel to remain free-floated. If the accessory screw protrudes excessively, it can be shortened with a file or sander to prevent contact.

Chapters

  1. 00:04Introduction: Common M-LOK Mounting Mistake
  2. 00:42Identifying Gas Block Proximity
  3. 01:13How Interference Occurs
  4. 01:52Impact on Firearm Accuracy
  5. 02:12The Solution: Reposition or Modify
  6. 02:49Accessory Screw Protrusion Issue
  7. 03:38Modifying Protruding Screws
  8. 04:04Conclusion and Viewer Engagement

Frequently Asked Questions

Why is mounting M-LOK accessories near an AR-15 gas block a common mistake?

It's a common mistake because the gas block is often very close to the bottom of slimmer handguards. If an M-LOK accessory is mounted too close, its hardware can press against the gas block, creating unwanted tension on the barrel and negatively impacting accuracy.

How does mounting an M-LOK accessory near the gas block affect firearm accuracy?

When an M-LOK accessory's mounting hardware contacts the gas block, it pushes the barrel upwards, preventing it from being free-floated. This pressure point introduces inconsistency, significantly degrading the firearm's accuracy and precision.

What is the primary solution for mounting M-LOK accessories near an AR-15 gas block?

The primary solution is to ensure the M-LOK accessory is mounted in a slot that does not interfere with the gas block. This allows the barrel to remain free-floated within the handguard, maintaining consistent accuracy. If necessary, the accessory can be moved further away.

What can be done if an M-LOK accessory screw is too long and interferes with the gas block?

If the M-LOK accessory screw protrudes too much and causes interference, even with a larger handguard, you can shorten the screw. This is typically done by carefully grinding or filing the screw down until it is flush with the M-LOK lock nut when fully tightened.

Related News

All News →

More Tactical & Gear Videos You Might Like

More from Brownells, Inc.

View all →