The Citadel Mariner features a side shell holder; full length barrel heat shield; Picatinny rail; adjustable rear sights and blade front sight. Includes three choke tubes. 12 Gauge Pump Action - Barrel: 18.5" - OAL: 39 - Chamber: 2/3 up to 3 - Weight: 6.9 lbs. - Stock: Walnut - Finish: Nickel - Capacity: 4+1 - 3 Choke Tubes - Side Shell Holder - Full length Barrel Heat Shield - Adjustable Rear Sight with Picatinny Rail - Blade front sight