Foxtrot Mike AR-15 MIKE-9 8.5 Colt Style Upper Receiver 9mm

The Foxtrot Mike AR-15 MIKE-9 8.5 Colt Style Upper Receiver 9MM Black delivers a purpose-built, monolithic Colt-style upper that combines rugged aluminum construction with precise, repeatable performance for AR-15 platforms. Designed for 9mm compatibility, this upper integrates a clean, single-piece monolithic design that enhances rigidity and alignment across the upper receiver, enabling reliable cycling and accurate shot groups when paired with compatible lowers. The 8.5-inch length, paired with an M-LOK profile, provides a compact, versatile configuration ideal for compact camp setups, competition, or duty-ready builds where compact 9mm firepower is advantageous. Its all-black finish not only contributes a discreet, professional look but also resists corrosion under field conditions. Crafted from high-grade aluminum, this upper is built to withstand the demands of functional training, varmint hunting setups, and quick-response scenarios where rapid magazine changes and dependable feeding matter. Whether upgrading an existing AR-15 or assembling a purpose-driven 9mm carbine, the Foxtrot Mike MIKE-9 upper delivers rigidity, compatibility, and streamlined integration for reliable, all-weather operation.