Mossberg 590 Shockwave 12 Gauge
Model: 50659
Mossberg 590 Shockwave 12 Gauge
Model: 50659
Full Specifications
About This Firearm
The Mossberg 590 Shockwave is a stockless pump-action 12 gauge built for compact storage and close-quarters defense. It has an MSRP of $592. At 26.37 inches overall the BATFE classified it as a non-NFA firearm, so it transfers like an ordinary long gun with no tax stamp.
The barrel is 14.38 inches of heavy-walled steel bored to a cylinder with a single bead on top, and the forend is the cob-styled type with a strap across it to keep the support hand in place with no stock to brace against. The Raptor grip is textured polymer in a bird's head profile, which Mossberg credits with control and less felt recoil. The gun takes standard and three-inch shells, six of them, nothing on it adjusts and there is no rear sight to work with.
If you're cross-shopping, the Remington 870 TAC-14 has an MSRP of $540 and sits at 26.3 inches on a 14.0-inch barrel, 5.6 oz heavier because its receiver is steel, and it holds four rounds against this gun's six. A full-size Mossberg 590 is the same action with a stock and a bead, seven rounds and 16.8 oz more, at 38.63 inches overall.
Best For
Strengths & Limitations
- Non-binding twin action bars, positive steel-to-steel lockup, an anti-jam elevator and dual extractors are the same parts the full-size 590 runs, so nothing here is a one-off mechanism.
- The magazine tube takes a clean-out cap at the front, so the spring and follower come out without stripping the gun.
- Sling swivel studs are fitted, so a gun with nothing to grab at the back can still be carried across the body with both hands free.
- Mossberg's own note says state and local law may be more restrictive, and that a gun classified this way federally can still count as a short-barreled shotgun or an assault weapon locally.
- This version is not sold as optic ready, so a red dot hangs off a clamp-on mount instead of a receiver cut.
- Shooting a bird's head grip is its own skill, and it does not transfer from a stocked shotgun.
Ballistics Calculator
Calculate trajectory, drop, and energy for 12 Gauge ammunition.
12 Gauge Ballistics →Frequently Asked Questions
Can a shoulder stock be added?
Not without changing what the gun legally is. Mossberg's classification rests on the firearm as it is sold, and a 14.38-inch barrel with a shoulder stock is the configuration the National Firearms Act covers, so that is a change to make with paperwork in hand and not after.
What capacity do three-inch shells give?
One fewer. Six is the count with standard-length shells, and Mossberg rates the gun for both lengths.
Is the action the same as a full-size 590?
Yes. The receiver, the action bars and the lockup are shared. The barrel, the grip and the forend change.
