I have an XCR, and I cannot get any loaded mag to lock in on a closed bolt. Empty mag will lock in just fine. Anyone have a suggestion on how to get a loaded mag to lock? Even with 1 round in, a mag won't lock on a closed bolt, so its not a rivet issue. This is with both a 5/30 GI mag, and 10 round LAR mags.
Clean & lube your mags, or replace your followers. There's no reason for it not to lock with just 1 round. The follower would have to be canted and be binding for this to happen if the mag seats normally when empty.
I find it hard to believe that there could be a problem with the followers on 10 different LAR mags and 1 GI mag, but I'll give it a try.



























