Enhanced AR/M16/M4 Bolts and Bolt Carriers - Part 1
This comprehensive guide, presented by Chris Bartocci, a recognized expert on the AR-15 platform, details various enhanced Bolt Carrier Groups (BCGs) for AR-15, M16, and M4 platforms. It covers baseline Mil-Spec designs, advanced features like dual extractors and integral gas keys, material science (Carpenter 158, 9310, 8620 steel), and specialized applications including lightweight and adjustable gas systems. The information is crucial for understanding reliability, durability, and performance improvements beyond standard military specifications.












