Description
The Mossberg 590S Shockwave 12 Gauge Pump Shotgun is a compact home-defense tool built for shooters who want reliable close-quarters performance. It cycles 1.75-inch, 2.75-inch, and 3-inch shells, letting you mix loads in the magazine without hiccups. This model uses Mossberg’s proven dual extractors and twin action bars for smooth feeding and positive steel-to-steel lockup. The top-mounted ambidextrous safety and bead front sight keep controls simple for new shooters.
| Manufacturer | Mossberg |
|---|---|
| Model | 590S Shockwave |
| Material | Steel barrel, polymer trigger housing (per manufacturer specs) |
| Compatibility | 12 Gauge shells: 1.75 in., 2.75 in., 3 in. |
| Finish | Matte blued barrel, black synthetic grip |
| Weight | 5.12 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Cycles Short Shells — Runs 1.75-inch mini shells without an adapter, giving you higher capacity and reduced recoil for newer shooters.
- Compact 14.375-Inch Barrel — Keeps the overall length at 26.37 inches, making it easy to maneuver in tight hallways and corners.
- Dual Extractor System — Pulls spent shells cleanly every time, even when you mix different shell lengths in the magazine tube.
- Ambidextrous Safety — Top-mounted tang safety works with either hand, so left-handed family members can operate it without fumbling.
- Positive Steel-to-Steel Lockup — Locks the bolt into the barrel extension for consistent ignition and reliable cycling under stress.
Who It’s For
This shotgun is built for families who want a simple, no-fuss home-defense tool. It works well for newer shooters because the short-shell option reduces kick, and the pump action is easy to learn. Experienced owners will appreciate the ability to feed any 12 Gauge shell length without changing parts. It is not for hunting or target shooting — this is a close-quarters tool.
Pros and Cons
- Pro: Cycles three shell lengths (1.75, 2.75, 3 inches) without any adapter or modification.
- Pro: Weighs just 5.12 lbs, light enough for smaller-framed shooters to shoulder quickly.
- Pro: Raptor grip with integrated strap provides a secure hold under recoil.
- Con: No shoulder stock means accuracy at distance is limited — this is a point-and-shoot tool for inside 25 yards.
- Con: Bead front sight is basic; adding a red dot requires a gunsmith or aftermarket rail.
Comparison
| Feature | Mossberg 590S Shockwave | Remington 870 Tac-14 | Mossberg 500 Cruiser |
|---|---|---|---|
| Shell Lengths | 1.75, 2.75, 3 in. | 2.75, 3 in. only | 2.75, 3 in. only |
| Weight | 5.12 lbs | 6.4 lbs | 6.5 lbs |
| Barrel Length | 14.375 in. | 14 in. | 18.5 in. |
| Safety Location | Top tang (ambidextrous) | Trigger guard (right-hand biased) | Top tang (ambidextrous) |
| Capacity (2.75 in.) | 5+1 | 4+1 | 5+1 |
| Price | $553.16 | $550 | $480 |
The 590S Shockwave edges out the Remington Tac-14 because it handles short shells, which means less felt recoil and more rounds in the tube. The Mossberg 500 Cruiser is cheaper but needs a longer barrel and lacks short-shell compatibility.
FAQ
What is the overall length of the Mossberg 590S Shockwave?
The overall length is 26.37 inches with the Raptor grip installed. This keeps it under the 26-inch minimum for a firearm classified as a non-NFA item, per ATF guidelines.
Can I use 3-inch magnum shells in the 590S Shockwave?
Yes, the 590S cycles 3-inch shells reliably. However, recoil will be heavier, and magazine capacity drops to 4+1 with 3-inch shells.
Does the 590S Shockwave come with a case or sling?
No, the shotgun ships with the Raptor grip and a bead sight only. You will need to purchase a case or sling separately. The grip strap is included.
Is the Mossberg 590S Shockwave legal to own without a tax stamp?
Yes, because the overall length is over 26 inches and the barrel is 14.375 inches, it is classified as a firearm, not a short-barreled shotgun (SBS). No NFA tax stamp is required. Check your state and local laws before purchase.
How do I clean the 590S Shockwave after shooting short shells?
Clean it the same way you would any pump shotgun. Short shells leave slightly more residue in the chamber, so run a bore brush and solvent after each range session. Mossberg recommends a light oil on the action bars and bolt.
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Last updated: April 2026
According to NSSF data, pump-action shotguns account for over 40% of new shotgun sales in the U.S., and the Shockwave series is one of the top-selling compact models.
Looking for more home-defense options? Check out our Pump Action Shotguns or Home Defense Shotguns.
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