12-20-2014, 08:42 PM
I just helped mount 2 barrels for a friend using blue loctite a few days ago. He had YHM uppers and they were perfectly square unlike many I have used. I have removed many barrels using blue loctite with out any problems. Use a little heat and it will wiggle loose. Don't over apply the blue loctite, just a small film around the outside of the barrel extension is plenty. I watched a video of some guy over applying it and it squirted out everywhere, completely unnecessary. Blue loctite works fine and is easy to remove when needed.

