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The Foxtrot Mike Products 9mm AR Complete Upper Receiver comes fully assembled and ready to drop on any pistol caliber lower receiver that uses Colt magazines. With its full-length Picatinny top rail and M-LOK compatible handguard, the Foxtrot Mike 9mm Upper offers plenty of mounting space for optics and other accessories.
A unique interlocking connector between the upper receiver and handguard ensures the barrel nut will not work loose over time.
Caliber: 9MM Barrel: 16" Premium Melonite-finished 4150 Carbone Steel Twist: 1-10" twist, Button-rifled Bore Threading: 1/2x36 Threaded Muzzle Rail: 15" Ultra Slim M-LOK Handguard Charging Handle: Ambidextrous Paratrooper Folding Style