EXO patented Nickel Boron coating on gun components. FailZero critical-parts upgrades, with EXO Nickel Boron Technology, are currently available for AR-15 and M-16/4 firearms. All FailZero parts are mil-spec quality and will properly fit weapons made by Glock, BushMaster, Beretta, Springfield Armory, Colt, DPMS, Double Star, Stag and others.
FailZero 5.56 Lightweight Bolt Carrier Group …components are EXO Nickel Boron with a high polish finish * Compatible with 5.56, .223, and 300 Blackout This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that…