ATI MilSport Complete AR-15 Upper 300 AAC Blackout 16" Black Nitride - ATI15MS300ML15

This is a complete AR-15 upper receiver assembly chambered in 300 AAC Blackout with a 16" black nitride steel barrel and 5/8x24 threaded muzzle. The upper features a 15" M-LOK handguard, adjustable poly flip-up sights, and includes the bolt carrier group and charging handle for a drop-in installation.