FosTecH Complete LOW MASS Bolt Carrier Group (Nickel Boron)
This is a standard full-auto M16 cut bolt carrier group. It is designed to function with the Echo AR-II and the Echo Sport.
Full Profile M16 Bolt Carrier Group — Low Mass Nickel Boron Coating
Compatibility: .223 / 5.56 / 300BLK
Weight: 8.5 Ounces
Finish: Nickel Boron