The Kaw Valley Precision AR-15 16" 9mm Complete Upper Receiver with 15.5" M-LOK Handguard is the ultimate upper receiver for your custom AR-9 built. This factory-assembled upper features a 7075-T6 aluminum receiver and a free-float M-LOK-compatible handguard designed to provide exceptional strength and improved heat dissipation while providing ample attachment space for your favorite tactical accessories. The 4150 steel barrel boasts a 1:10 twist for exceptional accuracy with a wide range of 9mm ammo offerings. To top it off, this factory-assembled upper receiver group comes equipped with a 1/2x36 Kaw Valley linear compensator, designed to reduce felt recoil, enhance accuracy, and provide a softer shooting experience overall. Compatible with any Mil-Spec lower receiver. Includes bolt carrier group and charging handle.