As used in aero precision m5 carbine - Tiger Rock AR-10 Heavy Buffer

Needed a heavier buffer for shooting suppressed with an adjustable gas block to tune in the gas without having the bleed off screw nearly all the way out. No clearance or fitment issues when using in an Aero Precision M5 with a carbine-length buffer tube. The bolt locks to the rear as it should, and passes a function check. Like others have said, no rattle whatsoever! Not all AR-10s are created equal; this was just my experience in my configuration. Your experience may vary.