This is a Radian Weapons Bolt Carrier Group, model R0081.
The Enhanced Bolt Carrier Group for AR15/M16 platform weapons was designed to minimize carrier tilt and reduce friction inside the upper receiver by relocating key bearing surfaces. All materials" tolerances" and coatings meet or exceed milspec standards for performance" reliability" and durability.
Features:
Case Hardened 9310 Steel Bolt
Case Hardened 8620 Steel Carrier
Black Nitride Finish