I have a hard time making one stay put as well. After really tightening a Q model down it still walked forward 1/2" in a thousand rounds. It is possible to stretch the original by over tightening and then it won't stay tight. I always install with no oil under it. I've never tried it but I expect removing the lubricant from the inside of the stabilizer and the barrel sleeve and then applying a thin coat of weak blue thread locker might help. You will have to let the thread locker cure. I wouldn't use red. If it gets too bad call Ft Smith and ask for a new one. It seems that a groove or something in the barrel sleeve would have been a good addition to index and hold the part in place. 1917