The Mossberg 590A1 with a 14-inch barrel and pistol grip is an NFA short-barreled shotgun variant with the full military-specification construction of the 590A1 platform in the most compact possible package. Requires NFA registration as an SBS. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 5 Year introduced: 2000, USA Weight: 7.25 oz Overall length: 29.5" Status: Active Military use: Yes Intended use: Military/NFA/Tactical