Builder's Grade Barreled 16" 9mm Upper Receiver | A2 | 15" M-LOK Handguard | Pistol Caliber | Black | Without Bolt Carrier Group and Charging Handle NO BCG OR CHARGING HANDLE INCLUDEDClick here for Charging HandlesClick here for Bolt Carrier Groups This Barreled 16 inch M-LOK upper receiver comes with a 15 inch free-float handguard and is built with only the best Mil-Spec components. The heart of this upper is comprised of a 4150 M4 barrel. Barrel: Barrel Material: 4150 CMV Steel Barrel Type: Button Rifled Barrel Caliber: 9MM SAAMI (9x19mm Parabellum) Barrel Twist: 1:10 Barrel Length: 16” Barrel Profile: Light (.740" at the thinnest cross-section) Inside Finish: Black QPQ Salt Bath Nitride Outside Finish: Black QPQ Salt Bath Nitride Muzzle Thread: 1/2x36" TPI (Threads Per Inch) Barrel Extension: AR15 (Will work with any Milspec AR15 Upper Receiver) Integrated feed ramp Designed to work with both Colt and Glock style AR-9 builds 11-degree Target Crown Upper Receiver: Machined from a Mil-Spec 7075 T6 Forging Black Anodization Handguard: 15" free-float handguard MIL-STD 1913 Picatinny rail on top M-Lok slots on 3 sides Precision Machined aircraft grade aluminum, for high strength and weight savings Clamp-on system for easy assembly Steel Barrel nut to resist movement under heat Made in the USA ***Please allow an additional 2-3 business days of lead time as these uppers are made to order.*** SKU: BGBU-169MM15-BLK UPC: