Bird’s-head-grip short firearm based on 590 pattern. ATF classified the Shockwave as a "firearm" (not a shotgun or short-barreled shotgun) because it ships without a stock and has a 14" barrel. This is the only entry in this database with type=Firearm — it will be excluded from shotgun-filtered queries by design. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge / 20 Gauge / .410 Bore Capacity: 8 Year introduced: 2017, USA Weight: 118.4 oz Overall length: 41" Status: Active Intended use: hunting, home_defense, competition