AR15 Project

[LVLAaron]

or 620 if you're a mag dumper

LOCTITE® 620

When it comes to bonding locating pins in radiator assemblies, sleeves in pump housings and bearings in auto transmissions – especially when you need high temperature resistance up to 232°C (450°F) – LOCTITE® 620 is a good choice. This high strength, anaerobic-curing retaining compound is...

next.henkel-adhesives.com

 

[wer0206]

You want a retaining compound like loctite 680.

LOCTITE® 680

LOCTITE® 680 is a green, high-strength, anaerobic-curing retaining compound for the assembly and attachment of cylindrical fitting parts, particularly where low viscosity is required. The product prevents loosening and leakage from shock and vibration, and provides robust curing performance by...

next.henkel-adhesives.com

This ^^^. Here's how Criterion recommends installing the barrel, gas block, gas tube, and muzzle device for precision AR-15 use:

In short:

• Green loctite 680 on extension
• Anti seize on barrel nut/barrel threads
• Make sure gas tube has no tension and can rattle a little
• Blue locktite 242 on gas block screws (not red)
• Rocksett on muzzle device if used as hub for suppressor

 

[LVLAaron]

Please reference loctite by it's number, not it's color. There are many of each with very different properties.

 

[wer0206]

Please reference loctite by it's number, not it's color. There are many of each with very different properties.

Good point, I have edited my post to include the loctite numbers

 

[eric32]

Well damn thanks guys I will add a note in the box for the assembly preferences