Chosen Armory
5.56 BlackNitride Bolt Carrier Group
5.56 BlackNitride Bolt Carrier Group
- Blacknitride+ Enhanced Heat Treat Finish,
- Precision Machined Bolt, RCA Stainless Steel Blacknitride+ Treated Firing Pin,
- Cam Pin, and Firing Pin Retaining Pin.
- Carrier material 8620
- Bolt material 9310
- Tool steel extractor and cam pin
- OCKS Gas Key screws, staked and torqued properly
- Proudly Manufactered in the USA by RCA
Much more than typical Parkerizing, phosphating or black oxide, Blacknitriding℠ is a thermal chemical diffusion of nitrogen and carbon into the surface of the steel. This process increases wear-resistance, fatigue strength, corrosion resistance, lubricity and cosmetic appeal
