The Mossberg 500 Combo ships with two interchangeable barrels — a ventilated rib hunting barrel and a slug or rifled barrel — making it one of the most versatile value-priced shotgun packages available. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 5 Year introduced: 1961, USA Weight: 224 oz Overall length: 47.75" Status: Active Intended use: Hunting, Home Defense, Slug