My RRA has been running 100%. I've put ove 1000 rds thru it with no problems. I recently installed BAD levers on all of my AR's as an upgrade. Today I found that my RRA would not lock back after the last round. This occurred using 4 different P-mags. I tried a GI metal magazine and the problem persisted. It was always a failure to lock back after the last round. I downloaded the magazines to three rounds and the lever did lock back after the last round, but whenever I ran a full magazine, I had the failure. I examined the bolt release as well as my BCG and everything looks fine. I'm stumped! I don't have that problem with my other BAD lever equipped lowers. By the way I was using S&B and Winchester white box 55 gr FMG and I was slow firing. I've since removed the BAD lever, but have not been able to shoot it to check if the problem is still there. I'm kind of annoyed since this gun has alway been 100% for me. Is it possible to simply wear out a bolt carrier release lever?