The Mossberg 590S Shockwave in 12 gauge (brand part no. 51601) is a pump-action firearm built around a 14.37-inch barrel with a 3-inch chamber, finished in matte blued steel and equipped with a bird’s-head grip rather than a shoulder stock, keeping it factory-classified as a standard firearm rather than a regulated short-barreled shotgun. Mossberg tops the 590S Shockwave with a bead sight and an ambidextrous top tang safety for fast, intuitive operation. Among pump shotguns in the pump action shotguns category, the 590S Shockwave favors shooters who want maximum 12 gauge firepower in the most compact legal footprint.

Key Specifications

• Chambered in 12 gauge with a 3-inch chamber.
• Operates as a pump-action firearm.
• Features a 14.37-inch barrel.
• Feeds from a tubular magazine with an 8-round capacity.
• Runs a fixed cylinder choke.
• Equipped with a bead sight.
• Runs an ambidextrous top tang safety.
• Barrel finished in matte blued steel.
• Ships without a shoulder stock, using a bird’s-head grip.
• Overall length is 26.37 inches.
• Ships at approximately 6.95 pounds.

Frequently Asked Questions

Is this an NFA-regulated item? No. The Shockwave ships from the factory with a bird’s-head grip instead of a shoulder stock, which keeps it classified as a standard firearm.

What is the magazine capacity? An 8-round tubular magazine.

Buy the Mossberg 590S Shockwave 12 Gauge

Maximum 12 gauge firepower in the most compact legal footprint is exactly what the 590S Shockwave delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.