Browning Buckmark top-strap

I have a Browning Buckmark .22 that has a problem. Every so often, the front allen screw that holds the "top-strap" on loosens. This piece holds the top of the barrel, keeping it aligned to the bolt face. When the screw loosens, I get failure to feeds. So I get out the allen wrench and tighten it up.

I'd like to fix this once and for all. But I'm pretty sure that at some point I will need to dis-assemble the pistol. I have some blue lock-tite. Would that be correct to use? I have used nail polish as locking agent on pieces that don't need to hold really tight, and not in harsh environments (like eyeglass screws). I'm thinking I only need something to stop vibrations.

Lee

I used the nail polish trick on my Buckmark (tac sol barrel). It held well all season in two leagues worth of shooting. I don't put anything on the rear screw...I just make sure to periodically check it. It rarely needs tightening.

My Buckmark. Tac sol barrel and sight rib. worked over sear, trigger with over travel.