WTS: New LMT bolt group. This is the one with the enhanced bolt carrier AND bolt. If you're not familiar with them, the carrier is basically a modified M16 carrier with extra reinforcements and lube holes, but for the AR-15 (semi-only). The bolt has the special chrome-like finish and double extractor springs. Supposed to be the very best in bolt groups. Never used. Complete, ready to install. $SPF shipped CONUS.