PORTSIDE MUNITIONS- M4 Full Auto Rated Bolt Carrier Group

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Portside Munitions Bomb 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
  • 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