Toolcraft .223/5.56/300 BLK M16 C158 Profile Bolt Carrier Group - Polished Chrome

We are extremely pleased to finally be able to offer a chrome bolt carrier group manufactured by Toolcraft! These BCGs exceeded our expectations. The combination of state-of-the-art coating technology and improved coating materials makes these some of the finest chrome bolt carrier groups ever manufactured. The Physical Vapor Deposition (PVD) process is used to apply a very thin (~3 micron) layer of Chromium Nitride (CrN) to all parts. The result is a BCG with the classic look of traditional chrome but with significantly increased performance. Chromium Nitride (CrN) benefits Twice as hard as traditional hard chrome Uniform thickness, no buildup in corners Adhesion is superior to traditional chrome plating Low coefficient of friction These chrome BCGs feature Mil-Spec Carpenter 158 bolts, M-16 full-auto profile carriers and the famous Toolcraft lifetime warranty. Bolt Shot Peened; MPI Bolt Material Carpenter 158 Steel Bolt Finish Chromium Nitride (CrN), Polished Caliber 223 | 5.56 NATO | 300 Blackout Extractor O-ring Viton; Mil Spec Carrier Material 8620 Steel, Toolcraft Proprietary Carrier Finish Chromium Nitride (CrN), Polished Carrier Design M16 Full Auto Style Gas Key Material 4130 Steel Cam Pin Material 4140 Steel Cam Pin Finish Chromium Nitride (CrN), Polished Extractor Material Tool Steel Firing Pin Material 8740 Steel; Hard Chrome Plated Manufacturer Toolcraft