The Mossberg 590S Shockwave is a compact, non-NFA pistol grip firearm built on Mossberg’s battle-proven 590 platform. Chambered in 12 gauge with a 3-inch chamber, it accepts 1¾-inch Minishells, 2¾-inch, and 3-inch shells, giving it versatile ammunition compatibility in a highly maneuverable package. At just 33 inches overall with a 14-inch barrel, it’s engineered for tight-quarters applications where a full-length shotgun isn’t practical.
Key Specifications
- The action is a pump action operating platform built on the reliable 590S receiver.
- This firearm is chambered in 12 gauge and accepts 3-inch shells.
- The barrel measures 14 inches with a matte blued finish for corrosion resistance.
- Total capacity is 8+1 rounds via an integrated tubular magazine.
- Overall length is a compact 33 inches, maximizing maneuverability in confined spaces.
- The choke is a fixed cylinder bore, optimized for close-range performance and Minishell compatibility.
- Sights consist of a single bead front sight for fast, instinctive target acquisition.
- The safety is an ambidextrous top tang design, operable by both right- and left-handed users.
- ATF classification is Pistol Grip Firearm, requiring no NFA registration or tax stamp.
- Shipping weight is approximately 7.1 pounds.
The 590S Shockwave delivers Mossberg’s legendary pump-action reliability in one of the most compact configurations legally available without an NFA stamp. The ambidextrous tang safety, rock-solid dual extractors, and Minishell-compatible action make this a serious tool for those who demand dependable performance in a minimal footprint. If you’re looking for a high-capacity, no-compromise compact shotgun firearm from a manufacturer with decades of proven duty-grade production, the 590S Shockwave belongs on your shortlist.
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