The FosTech AR-15 Bolt Carrier Group is a full profile M16 Bolt Carrier Group.  Featuring a low mass nickel boron coating, the FosTech AR-15 Bolt Carrier Group works with the Echo II and Echo Sport Trigger.  The Bolt Carrier Group also works with standard gas blocks and buffer springs, although we do recommend using an adjustable gas block for optimal performance.  Weighing in at a mere 8.5 ounces, the Fostech Bolt Carrier Group is compatible with .223, 5.56, and 300BLK platforms.

  • Full Profile M16 Bolt Carrier Group
  • Compatible with Echo II and Echo Sport Triggers
  • Compatibility: .223 / 5.56 / 300BLK
  • Weight: 8.5 Ounces
  • Finish: Nickel Boron