Mossberg 590 Shockwave Blued 410 3in Pump Action Firearm - 14in - The 590 Shockwave Raptor bird's head pistol grip is uniquely shaped to minimize felt recoil. Classified by the ATF as a Pistol Grip Firearm, the Shockwave is not an NFA Title II firearm and does not require a Tax Stamp. This is a Federal classification. Additional state restrictions may apply.. The 590 Shockwave features a convenient clean-out tube magazine cap, a front bead sight, and 'corn cob' strapped forend to keep shooter's lead hand clear of the muzzle. This 410 model has a 14" heavy-walled barrel with a cylinder bore and a blued metal finish. Corn Cob Forend withStrap Raptor Grip Heavy-Walled Barrel