Are there any instructions posted for barrel renoval and installation ? I am needing to take my barrel off to have it threaded for a muzzle brake . I have a friend that will thread it if I can get it off. thankks gtntn

FALARAK's Build -it-Yourself Thread

Somewhere middle of first page.

Good luck!

1. Remove handguard halves by pulling rearward on the delta ring and pulling outward on the rear of each handguard.

2. Remove the gas tube by driving out its retaining roll pin using a 1/16" punch.

3. Place the upper receiver in an action block in a vise and loosen the barrel nut/delta ring assembly with an armorer's wrench.

4. Remove the barrel from the upper receiver with a pull and twist motion.