I used to have one of those cable doo-dads on my laptop case; I found that it liked to periodically unscrew itself. That's not so bad if the only thing it's holding is an ID tag, but I'd hate to drop my AR because of it. I thought about dropping a bit of solder in the end, but not before the cable wore in two, so I don't know how well it would've worked.
Good advice, I did use a couple of small pliers to tighten the heck out of it, but I may go back and put some Red Loctite. And maybe double them up? Thanks!