After about 100 to 150 rds my bolt handle keeps coming loose. I tried blue loc-tite (although it was a few months old) and that did not stop the problem. Now I do a lot of rapid fire and think heat and dissimilar metals might be the problem. Any of you mechanics have any ideas on what to do that will still allow me to remove the bolt handle if needed. As this is the only issue I have with the carbine I am not going to consider it a major problem, it just annoys me.