Bolt Carrier Group fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm .300 Blackout. - Technical Specs - Mil-Spec dimensions - Bolt Carrier Group Material: Case Hardened 8620 - Steel Finish: Black Nitride. - This advanced low friction coating minimizes the need for lubricants. - Gas Key: 4130 Steel attached with Grade 8 hardware and properly staked into a milled valley to ensure proper positioning. - Cam Pin: Hardened 4340 cam pin - Firing Pin: Mil Spec firing pin made of 8740 steel center-less ground and Hard Chrome coated - Bolt Assembly: The Bolt is true Mil Spec dimension and external surfaces are CNC ground after heat treat for a precision fit. - Bolt Material: Case Hardened 9310 Steel. - Finish: All Bolt components Black Nitride - Extractor: 4340 Steel Mil Spec - Extractor Spring & O-Ring Combination - MPI: Magnetic Particle Inspected - HPT: High Pressure Test - Made in USA - Carrier fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm .300 Blackout
|Finish||All Bolt components Black Nitride|
Determined at checkout.