The Mossberg 590 Shockwave delivers legendary Mossberg pump-action reliability in a compact, maneuverable platform built for defensive and security applications. Featuring the signature Shockwave bird's-head grip, this firearm is engineered to reduce felt recoil while maintaining excellent control in close-quarters environments. Built around a heavy-walled 14.375 barrel, the 590 Shockwave offers durability and consistent performance with 3 12-gauge shells. Mossberg's proven dual extractors, twin action bars, and positive steel-to-steel lockup ensure smooth, reliable cycling under demanding conditions. The strapped corncob forend provides enhanced control, while the clean-out magazine tube and drilled-and-tapped receiver add practical serviceability and mounting flexibility. Compact, rugged, and purpose-built, the 590 Shockwave carries forward the design elements that have made Mossberg pump-actions trusted by millions worldwide. Specifications. Gauge: 12 Gauge Action: Pump-Action Chamber: 3 Capacity: 5+1 Barrel Length: 14.375 Barrel Type: Heavy-Walled Choke: Cylinder Bore Finish: Woodland Camo / Matte Blue barrel Sights: Front Bead Stock / Grip: Shockwave Bird's-Head Grip Forend: Corn Cob with Strap Overall Length: 26.37 Weight: 5.25 lbs