This guide, drawing from Mrgunsngear's expertise, details the critical components and specifications of an AR-15 Bolt Carrier Group (BCG). It covers essential materials like 158 Carpenter Steel and 9310 Steel for bolts, and 8620 Steel for carriers, alongside vital testing standards (HP and MP) and durability treatments like shot peening and chrome lining. The guide also differentiates between full-auto and semi-auto carriers and stresses the importance of proper gas key staking for reliability.
This video details the Fail Zero AR-15 Bolt Carrier Group, highlighting its proprietary EXO treatment, a nickel boron coating that provides exceptional hardness, abrasion resistance, and lubricity. The coating reduces friction, heat, and the need for lubrication, allowing for reliable function up to 50,000 rounds. The BCG also undergoes shot peening and magnetic particle inspection for quality assurance, with the gas key meeting USGI specs and being chrome-lined.
You've reached the end! 2 videos loaded.
Gun Laws by State
Read firearms regulations for all 50 states + D.C.
Find Gun Dealers
Search licensed FFL dealers near you.
