The Heavy Duck Gun was introduced in 1935 and was chambered for the 3” magnum 12 gauge only. All model 12s of this era had Nickel Steel barrels, except the ones with Stainless Steel barrels. 30” and 32” barrels were offered until around 1948 when the 32” barrels were discontinued. These 3” magnums were also offered as Trap guns and Pigeon Grade guns. Special features may include barrels with solid rib, or ventilated rib. Special features include fancy stocks, checkering, carving, and engraving.