Toolcraft Nickel Boron .308 Bolt Carrier Group

Toolcraft Nickel Boron .308 Bolt Carrier Group | BCGThis Toolcraft 308 / AR-10 / 6.5 Creedmoor Nickel Boron BCG is trusted by weapons manufacturers and custom rifle builders worldwide. Now you too can get this outstanding BCG at a fraction of the cost.The bolt is CNC machined from heavy-duty 9310 alloy steel. 9310 steel has a high core & fatigue strength rating, a high hardenability rating, and when properly treated, it is actually about 7% stronger than the "mil-spec" Carpenter 158 steel. The bolt is shot-peened (stress-relieved) and finished with the same Nickel Boron finish as the carrier. The bolt also comes completely assembled with mil-spec gas rings and a high tensile 4140 steel extractor. The bolt is also Magnetic Particle Inspected (MPI) for quality assurance.The Nickel Boron Carrier is machined from 9310 steel. The gas key is made of QPQ-Nitride-finished 8620 steel, fastened to the carrier with Grade 8 screws and then properly staked. The carrier also features serrations for forward assist.Included Nickel Boron Bolt Assembly - Standard bolt Nickel Boron Carrier w/ properly staked Gas Key Cam Pin 8740 Stainless Steel Firing Pin Firing Pin Retaining PinSpecifications Gas system: Direct Impingement Caliber: .308 Winchester / 6.5 Creedmoor / 6mm Creedmoor Finish: Nickel Boron (bolt, carrier, gas key, cam pin) Bolt: 9310 Steel (Magnetic Particle Inspected) Carrier: 8620 Aircraft Grade Steel Firing Pin: Mil-spec 8740 steel with hard chrome finish Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed Cam Pin: 8620 Steel w/ QPQ Black Nitride Finish