The Foxtrot Mike AR-15 MIKE-9 Colt Bolt Carrier Assembly in black delivers reliable performance for 9mm AR platforms, expertly engineered to fit AR-15 receivers with precision and durability. This bolt carrier group combines the trusted Colt-style design with Foxtrot Mikes meticulous machining and finishing, providing smooth cycling and consistent ignition for optimized function in dedicated 9mm builds. Crafted for dependable operation, the MIKE-9 BCG features a robust black finish that resists wear and corrosion while maintaining slick, clean geometry to reduce friction across the bolt lugs and operating surfaces. Its compatibility with AR-15 configurations makes it a straightforward upgrade or replacement for shooters seeking enhanced reliability, clean chambering, and repeatable lockup during rapid or semi-automatic fire. Whether youre building a pistol-caliber carbine for range days, competition, or practical defense applications, this bolt carrier assembly supports dependable feed, extraction, and cycling across a variety of 9mm ammunition, delivering steady performance in a compact, purpose-built package. Trust Foxtrot Mike to provide a purpose-driven BCG that integrates seamlessly with your AR-15 platform for consistent, accurate shooting.