This guide details how to inspect AR-15 Bolt Carrier Groups (BCGs) for critical manufacturing defects, specifically focusing on peening marks and burrs on the carrier rails. Instruction from School of the American Rifle highlights how these imperfections, often resulting from attempts to correct loose carrier key pockets, can cause significant damage to the aluminum upper receiver. Proper inspection is crucial for ensuring BCG longevity and firearm reliability.
This review details the Robar NP3 finish applied to a Glock 23 Gen 2 and an AR-15 BCG. The NP3 finish, an electroless nickel base with Teflon, offers exceptional hardness, durability, and a slick surface, reducing friction and improving performance. It significantly enhances corrosion resistance, particularly against salt spray, and simplifies cleaning. The review also covers pricing and additional EDC accessory upgrades for the Glock.
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