When Not to Use Thread Lock On Guns

Published on December 30, 2022
Duration: 9:44

This guide details the proper application of thread locking compounds on firearms, differentiating between Red and Blue Loctite based on heat exposure and vibration. It emphasizes critical 'never' applications, such as on barrel extensions and barrel nuts, and provides specific recommendations for optics, sights, gas blocks, and holster screws. The advice comes from an expert instructor, highlighting potential warranty voiding and the importance of correct compound selection for firearm reliability and safety.

Quick Summary

Expert firearms instructor advises against using threadlocker on critical components like barrel extensions and barrel nuts. Red Loctite is for moderate heat/vibration, Blue Loctite for cooler parts like receiver rail optics, and specialized compounds are needed for high-heat barrel attachments.

Chapters

  1. 00:00Introduction to Threadlocker Discussion
  2. 00:20Disclaimer and Viewer Requests
  3. 00:53Red Loctite General Use and Exceptions
  4. 01:25Blue Loctite for Receiver Rail Mounts
  5. 02:15Red Loctite for Heat-Exposed Components
  6. 02:43High-Heat Resistant Compounds for Barrels
  7. 02:57Manufacturer Advice on Small Screws
  8. 03:55No Loctite for Spring-Loaded Mounts
  9. 04:47NEVER Loctite Barrel Extension
  10. 06:34NEVER Loctite Barrel Nut
  11. 07:40Discretionary Loctite Use
  12. 08:26Pistol Applications
  13. 08:54Holster Retention Screws

Frequently Asked Questions

What is the primary difference between Red and Blue Loctite for firearms?

Red Loctite is a high-strength threadlocker suitable for components experiencing significant vibration and moderate heat. Blue Loctite is medium-strength, ideal for parts that don't get excessively hot, like optics mounted on receiver rails, preventing loosening from recoil.

Where should you NEVER use threadlocker on a firearm?

You should never apply threadlocker to the barrel extension when installing it into an upper receiver, nor on the barrel nut. These components rely on precise torque and specific installation methods, and threadlocker can cause irreparable damage or make disassembly impossible.

What type of threadlocker is best for pistol sights mounted on a slide?

Pistol sights mounted directly to the slide experience significant heat. For these applications, Red Loctite is recommended to ensure they remain secure under thermal stress and recoil, preventing dangerous shifts in zero.

Can I use threadlocker on my AR-15's barrel nut?

No, you should never use threadlocker on an AR-15's barrel nut. It is designed to be secured solely by torque. Applying threadlocker can make future removal extremely difficult, potentially damaging the aluminum upper receiver.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from The VSO Gun Channel

View all →