Toolcraft .223/5.56/300 BLK C158 M16 Profile Bolt Carrier Group - Black Nitride

Toolcraft .223/5.56/300 BLK C158 M16 Profile Bolt Carrier Group - Black NitrideToolcraft Inc. is an OEM manufacturer of bolt carrier groups (BCGs) for many AR15 makers. These companies know they can trust Toolcraft quality and are proud to have their logos applied to Toolcraft BCGs. Toolcraft products are also trusted by the U.S. Military and carry a lifetime warranty.The finish is Black Nitride, which is a metal treatment that produces a case-hardened surface. The resulting finish is extremely wear and corrosion-resistant. It is also very slick, especially compared to the traditional phosphate finish. This means that all contact surfaces of the BCG will experience less friction and smoother, more reliable function. Easy clean-up of this smooth surface is a nice bonus. The rich black color on these BCGs looks great on the Black Rifle!Specifications Bolt: Shot Peened; MPI Bolt Material: 9310 or Carpenter 158 (C158) Steel Bolt Finish: Black Nitride Caliber: .223 | 5.56 NATO | 300 Blackout Extractor: O-ring Viton; Mil Spec Carrier Material: 8620 Steel, Toolcraft Proprietary Carrier Finish: Black Nitride Carrier Design: M16 Full Auto Style Gas Key Material: 4130 Steel Cam Pin Material: 4140 Steel Cam Pin Finish: Black Nitride Firing Pin Material: 8740 Steel; Hard Chrome Plated Manufacturer: Toolcraft