The A400 Xtreme Plus Optifade® Timber Semi-Auto shotgun features Beretta’s exclusive Steelium Plus barrels for reduced felt recoil as well as a step rib and enlarged controls for easier manipulation in all weather conditions. – Model Name A400 Xtreme PLUS KO Optifade Timber – Gauge 20 – Barrel Length 28 – Choke OBF-HOPB – Barrel type Optima Bore HP Steelium Plus – Chamber (in) 3 – Choke 5 Black Edition 20mm extended chokes – Lylium Y – Receiver OPTIFADE TIMBER – Rib Step Rib 7x7mm with Mid Bead – Stock Kick-Off Mega & Kick-Off3 with Soft Comb