The Mossberg 590M Shockwave in 12 gauge (brand part no. 50208) is a pump-action firearm built around a 14-inch barrel and a bird’s-head grip with no shoulder stock, classified by the ATF as a firearm rather than a Title I shotgun. Mossberg feeds it from a detachable 10-round box magazine rather than a tubular magazine, finishes the barrel in blued steel, and runs a manual safety with a bead sight and cylinder choke. Among pump-action shotguns, the 590M Shockwave favors shooters who want detachable box-magazine capacity in the Shockwave format.

Key Specifications

• Chambered in 12 gauge.
• Operates as a pump-action firearm.
• Features a 14-inch barrel.
• Holds 10+1 rounds via a detachable box magazine.
• Runs a manual safety.
• Equipped with a bead sight.
• Includes a cylinder choke.
• Finished in blued steel.
• Overall length is only 30.85 inches.
• Ships at approximately 8.75 pounds.

Frequently Asked Questions

What is this classified as? A firearm under ATF classification, since it ships with a bird’s-head grip and no shoulder stock, not a standard Title I shotgun.

How does it feed? From a detachable 10-round box magazine, unlike the tubular magazines on most Mossberg pumps.

Buy the Mossberg 590M Shockwave 12 Gauge

Detachable box-magazine capacity in the Shockwave format is exactly what the 590M delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.