Bolt Carrier Group

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both...

The LBE Nickel Boron Complete BCG includes the firing pin, retaining pin, cam pin, extractor and bolt gas rings. Made in the USA.Features :Fits AR-15Complete NIB BCGMade in the USA

This BCG is designed to operate with either 6.5 Grendel or Hornadys new 6mm ARC. Will not work with CMMG MkW platform. It is designed for standard AR variants.Features :CALIBER: 6.5 Grendel/6mm ARC

This 9mm AR Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero 9mm BCG is compatible with both lowers designated for Glock or Colt magazines. All critical parts are coated with EXO...