The Rubber City Armory Titanium Bolt Carrier Group features a Titanium carrier, to provide an entire assembly that weighs in at 7.8oz. The M16 profile carrier allows the piece to interface with standard AR-15 or M16 components. The Titanium carrier features a proprietary aerospace nitride coating, which allows for superior durability and wear resistance not otherwise found on Titanium components. Bolt is machined from 9310 steel and the billet gas key is properly staked & torqued. Tool steel extractor and cam pin ensure proper function. Mfg: Rubber City Armory SPECS: Fits standard AR-15/M16 rifles. Carrier is machined from Titanium Weight - 7.8oz.