I recall a few years ago a fellow here used one that was a hair too long and wasn't paying attention while screwing his in. He ended up actually cracking the safety selector. If you've changed anything like grip or screw or both, just be mindful of that and you'll be fine.
I'd also go with the lock ring over thread locker. I'll take a page from Clint Smith and say "quit f**king with god and Eugene".