Ballistic Advantage's .300 Blackout complete upper is a popular upper assembly for home builders, featuring BA's Hanson-profile .300 Blackout barrel and suppressor-optimized port timing. Type: Rifle Action: Semi-Automatic Caliber: .300 Blackout Capacity: 30 Year introduced: 2015, USA Weight: 24 oz Overall length: 18" Status: Active Intended use: Home Defense, Hunting