Bolt Carrier Group fits AR15/M4 compatible style Rifles (i.e.) .223/5.56mm, .300 Blackout.

Technical Specs:
True Mil-Spec 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 Shot Peened and Manganese Phosphate or Black Nitride
Extractor: 4340 Steel , Manganese Phosphate coated
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