
Durability Lubricity Corrosive Resistance Carbon Resistance
Durability Lubricity Corrosive Resistance Carbon Resistance Extreme Metal hardness 85-90 Rockwell Caliber / Gauge .223/.223 Wylde/300acc blackout/5.56 NATO Carrier Style mil-spec Platform AR15 Bolt Finish Parkerized Bolt Material 9310 Steel Carrier Finish Black Nitride Gas Key Staked Magnetic Particle Inspection Yes Combat Armory machinist take pride in delivering the very best for our customers used by Military, Police, and Firearms enthusiasts