Ive put atleast 10,000 rounds through mine in about 3-4 months w/o any problems. Pretty reliable imo. And thats not all with top price ammo either. Ive shot reloads, steel case, lacqured steel(brown bear) and regular non fired brass and never had an issue.ive built and modded a few DPMS AR's for friends. they are the best quality parts for the price.