The Rubber City Armory .308 Win BCG featuring a black nitride finish, is a strong and easy to clean bolt carrier group you need in your .308 Win rifle. The black nitride finish is an enhanced heat treatment that eliminates the need for excessive oil or grease on components. It also is corrosion resistant and makes maintenance easier by the increased lubricity of the BCG.Features: Caliber: .308 Win / 7.62 NATO / 260 Rem / 6.5 Creedmoor / 22-250 / 6mm Bench Rest Weight: 18.17 oz. Finish: Blacknitride+ Material: Carrier: 8620 Steel Bolt: 9310 Steel Profile: Full MassThis bolt face is specifically machined to handle high pressure rounds so you can be confident in shooting factory ammunition or high pressure reloads. Be sure to break down and clean your bolt carrier group regularly so carbon doesn't over build up. The carrier on this Rubber City Armory BCG is serrated for use with a forward assist and includes a billet gas key that is properly torqued and staked.Whether you're an avid shooter or a competitor, this BCG is designed for durability and performance. Just remove your old BCG and drop in this state of the art bolt carrier group for the best upgrade you can make.