Iver Johnson IJ500 Features This Iver Johnson semi-automatic shotgun is built around a gas operating system with two included pistons a light pressure piston for shells under 1.15 ounces and a high pressure piston for heavier loads above that weight. This dual-piston setup lets the shotgun cycle reliably across a wide range of shell weights from light target loads to heavy 3.5 inch magnum waterfowl loads. The 28 vent rib barrel is constructed from 4140 hardened steel providing durability under repeated heavy magnum use. Five mobile-style choke tubes ship with the shotgun giving hunters the ability to tailor their pattern for different ranges and applications. A fiber optic front sight paired with a brass bead intermediate sight helps shooters track fast-moving targets like ducks and geese in variable light conditions. The black synthetic stock resists moisture and temperature extremes far better than a traditional wood stock an important trait for waterfowl hunters who spend hours in wet blinds. At an overall length of 49 inches the shotgun maintains a balanced feel suited to both fast swings on birds and stability during aimed shots. Built for hunters who need dependable performance across a range of shell types the Iver Johnson 12 gauge shotgun is for sale at GrabAGun. Iver Johnson IJ500 Specifications Manufacturer: Iver Johnson Gauge: 12 GA Action: Semi-Auto Barrel Length: 28 Chamber: 3.5 Choke: 5 Mobile-Style Chokes Stock Material: Synthetic Color: Black Sights: Fiber Optic Front Brass Bead Overall Length: 49 Available At: GrabAGun