The Wraithworks Slick Side Aluminum Complete Upper is chambered in .223 Wylde and features a slick-side billet aluminum upper receiver, 16" black nitride barrel, mid-length gas system, 13.325" M-LOK handguard, charging handle, and bolt carrier group. Designed for a clean, lightweight AR-15 build. Upper only — lower receiver and magazine not included.  More Information SKU WARP15-UP-AC-E Manufacturer Wraithworks Caliber .223 Wylde Action Type Semi-Automatic Style AR-15 Color Black Magazines Included 0 Barrel Length 16'' Rate of Twist 1:8'' Threaded Barrel Yes Sights No