Originally Posted by
Aries144
I used a 16" pencil barrel BCM upper with a Rocksett'ed AAC Ranger 2 for about four years of 3-gun/2-gun plus night matches, training, range time with friends, teaching new shooters, etc in 100F+ temps with 100% humidity, down to 20F at night, in the rain, in the mud, etc. About 8000 rounds or so. I had to stop torquing it on with a strap wrench because it made it a bitch to take off for quarterly cleaning. Hand tight + Rocksett and never had one issue after the first time, where I used only a dot of Rocksett. After learning to generously apply the Rocksett, I never had an issue again.
Rocksett is great stuff.
ETA, buy a strap wrench. Even only hand tight, I had to wrap the can with a wet cloth, to get enough grip, and use a strap wrench on a few occasions to remove the can.
Further details: the rifle was routinely made very hot. Sighted mag dumps were a thing, training muzzle control. Never more than three mags at a time, because I didn't want to trash the barrel. The setup lived through a lot of close range rapid fire for some of the competition stages, though never more than a couple of mags for a stage with the average being about a mag and a half, IIRC.