The Mossberg 590 Shockwave .410 features a 14.375-inch barrel with bird's-head pistol grip in the smallest bore of the Shockwave family. Type: Pump-Action Shotgun Action: Pump-Action Caliber: .410 Capacity: 6 Year introduced: 2017, USA Weight: 4.25 oz Overall length: 26.375" Status: Active Intended use: Home Defense, Compact