Aero Precision .224 Valkyrie/6.8 SPC Bolt Carrier Group, Complete - Black Nitride

Aero Precision .224 Valkyrie/6.8 SPC Bolt Carrier Group, Complete - Black Nitride The Aero Precision .224 Valkyrie Bolt Carrier Group for AR-15 rifles is made from high quality materials with quality assurance measures like high pressure testing and magnetic particle inspecting. The bolt assembly is machined from Carpenter 158 tool steel and tested to ensure it can withstand thousands of high-pressure rounds. The Carrier assembly is machined from 8620 steel and the entire BCG is magnetic particle inspected to ensure every dimension is as precise at can be. The black Nitride finish increases hardness and creates an extremely smooth surface for ease of cleaning and improved reliability. If you want to build a no frills, reliable duty rifle, you can't go wrong with this Aero Precision BCG. Features: Compatible with 6.8 SPC and .224 Valkyrie M16 cut and full auto rated 8620 steel carrier Carpenter 158 tool steel bolt MPI and HPT Black Nitride finish Properly staked gas key Chrome lined gas key and firing pin channel Shot peened bolt face Black O-ring extractor insert Specifications: Bolt Finish: Salt Bath Nitride Bolt Material: Carpenter 158 Steel Brand: Aero Precision Caliber Gauge: .224 Valkyrie Carrier Finish: Salt Bath Nitride Carrier Material: 8620 Carpenter Steel Carrier Style: M16 Bolt Carrier High Pressure Tested: High Pressure Tested Magnetic Particle Inspect: Magnetic Particle Inspected Platform: AR-15 Weight: 11.52 oz.