The Mossberg 590 Shockwave in 20 gauge (brand part no. 50637) is a pump-action firearm built around a 14.375-inch heavy-walled barrel with a 3-inch chamber, equipped with a Crimson Trace laser saddle mounted directly to the bead sight for fast point-of-aim confirmation. Mossberg ships this Shockwave 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. Among pump shotguns in the pump action shotguns category, this Shockwave favors shooters who want a laser-equipped, maximally compact 20 gauge for close-range defense.

Key Specifications

• Chambered in 20 gauge with a 3-inch chamber.
• Operates as a pump-action firearm.
• Features a 14.375-inch heavy-walled barrel.
• Feeds from a tubular magazine with a 5+1 capacity.
• Runs a fixed cylinder choke.
• Equipped with a Crimson Trace laser saddle on the bead sight.
• Runs an ambidextrous safety.
• Ships without a shoulder stock, using a bird’s-head grip.
• Overall length is 33 inches.
• Ships at approximately 6.95 pounds.

Frequently Asked Questions

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

What does the laser saddle do? A Crimson Trace laser mounts to the bead sight for fast point-of-aim confirmation.

Buy the Mossberg 590 Shockwave 20 Gauge Laser Saddle

A laser-equipped, maximally compact 20 gauge for close-range defense is exactly what this Shockwave delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.