The Mossberg 500 Tactical with an 18.5-inch barrel is a compact defensive shotgun featuring a cylinder-bore barrel, bead front sight, and synthetic stock for home defense and law enforcement use. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 1961, USA Weight: 7.75 oz Overall length: 38.5" Status: Active Intended use: Tactical/Home Defense