Trying to put a new Montana sling (grovtec hardware) on a Mossberg 500. The magazine cap is tapped for a sling stud, but the sling stud rotates the threaded magazine cap loose. This makes the barrel slightly loose (though it can't come off with a sling on) and it's annoying. I think the magazine cap needs to be able to spin independently of the sling stud for this to work.
Is there a smarter way?
Is there a smarter way?