Panzer Arms FS1 Pro Black/FDE 20-inch Folding 12 Gauge Shotgun The Panzer Arms FS1 Pro Black/FDE is a folding 12 gauge shotgun with a 20-inch barrel and a 3-inch chamber. This version combines the Black/FDE finish configuration with a Mobile choke system. A gas-operated semi-automatic action, a 7075 T6 aluminum receiver and synthetic furniture form the Black/FDE configuration. The capacity is 4+1: four rounds in the magazine plus one in the chamber. Shop the FS1 Pro Black/FDE at BattleHawk Armory. 20-inch Barrel and 3-inch Chamber The barrel measures 20 inches, and the chamber is specified at 3 inches. Those dimensions identify the barrel and chamber separately; they should remain central when selecting the correct ammunition for the firearm. Folding Configuration and Choke System The FS1 Pro folding design supports a more compact arrangement for storage and transport. Its Mobile choke system provides choke selection as part of the shotgun configuration. Follow the firearm and choke instructions when pairing ammunition with choke equipment. Gas Operation and Aluminum Receiver This Black/FDE FS1 Pro uses a gas-operated semi-automatic action with a 7075 T6 aluminum receiver. Synthetic stock and forend components complete the furniture arrangement, and the exterior has a Black/FDE Cerakote finish. Sights and Handling Features Glock-style fiber optic sights provide the sighting system. The configuration also includes an adjustable cheek riser, shell holders, a barrel shroud and a left-side Picatinny rail. Match any added mount to the rail and the clearance available on the shotgun; a sight style is not a guarantee of aftermarket sight interchangeability. Product Specifications Brand: Panzer Arms Model: FS1 Pro UPC: 199284113589 SKU: FS1-PRO Product Type: Folding shotgun Gauge: 12 Gauge Barrel Length: 20 inches Chamber: 3 inches Capacity: 4+1 Finish: Black/FDE Cerakote Choke System: Mobile Action: Gas-operated semi-automatic Receiver: 7075 T6 aluminum Stock and Forend: Synthetic Sights: Glock-style fiber optic Accessory Rail: Left-side Picatinny Additional Features: Adjustable cheek riser, shell holders and barrel shroud Chokes: F, M and CL Frequently Asked Questions What is the barrel length? The barrel is 20 inches long. What chamber length is specified? The FS1 Pro has a 3-inch chamber. What is the capacity? This configuration has a 4+1 capacity. Does this shotgun fold? Yes. Folding is part of the FS1 Pro configuration. What distinguishes this version? It combines Black/FDE Cerakote, gas-operated semi-automatic operation and a 7075 T6 aluminum receiver. Purchase the FS1 Pro Black/FDE at BattleHawk Armory. Explore Panzer Arms at BattleHawk Armory for more from the brand.