Brownells - AR-15 Bolt/Carrier Group
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.












