Mossberg 54183: This firearm features dual extractors, positive steel to steel lockup, twin action bars, and an anti-jam elevator ensure smooth operation. Top mounted safety provides for ambidextrous operation. This 20 gauge 3" shotgun combo comes with two barrels. A vent Rib ported field barrel with dual beadsand Accu-Set choke and a ported rifled slug barrel that is fully rifled with adjustable iron sights for deer.