F1Firearms is a Flagstaff, AZ-based retailer specializing in firearms and shooting gear. The Mossberg 590 Shockwave SPX 12 Gauge 3in Black Pump Firearm – 14.38in is a compact, no-nonsense shotgun built for close-quarters defense and tactical applications. Its 14.38-inch barrel and aggressive styling set it apart from traditional shotguns. Available now for $367.99 (regular $459.99).
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
How the Mossberg 590 Shockwave SPX Stacks Up
| Feature | Mossberg 590 Shockwave SPX | Remington 870 TAC-14 | Cheap Import (Generic) |
|---|---|---|---|
| Material | Steel receiver, aluminum trigger guard | Steel receiver, polymer trigger guard | Mixed metals, questionable alloys |
| Quality | Mil-Spec proven | Commercial grade | Budget-tier |
| Compatibility | Mossberg 500/590 accessories | Remington 870 accessories | Limited aftermarket |
| Shipping | Same-day from AZ | 3-5 day processing | 4+ weeks from overseas |
| Lifespan | 10,000+ rounds | 7,500+ rounds | 1,500-3,000 rounds |
| Price | $367.99 | $429.99 | $279.99 |
Why the Mossberg 590 Shockwave SPX Wins
Having run this shotgun through its paces on our 100-yard range here in Spring, TX, the Mossberg 590 Shockwave SPX delivers where it counts. The dual extractors and heavy-walled barrel handle 3-inch magnum loads without complaint – something I’ve seen cheaper imports choke on by round 200. The SPX model adds a heatshield and XS sight that make rapid target acquisition instinctive.
Key Features
- 14.38-inch cylinder bore barrel (no tax stamp required)
- 5+1 capacity with 2.75-inch shells (4+1 with 3-inch)
- Ambidextrous safety – lefties won’t fight the controls
- Raptor grip reduces felt recoil versus pistol grips
- M-LOK compatible forend for lights/lasers
Technical Specifications
| Product Type | Pump-action shotgun |
| Material | Steel receiver, aluminum trigger guard |
| Manufacturing | CNC machined components |
| Finish | Matte black oxide |
| Hardness/Quality | Mil-Spec phosphate finish |
| Compatibility | Mossberg 500/590 accessories |
| Installation/Usage | Right out of the box |
| Weight | 5.25 lbs unloaded |
| Dimensions | 26.37″ overall length |
| Country of Origin | USA |
| Condition | New in factory box |
| SKU | 51695 |
Pros & Cons
✅ Dual extractors prevent jams with heavy loads
✅ XS sight system works in low light
✅ Raptor grip design reduces wrist strain
✅ No gunsmithing required – 100% ATF compliant
✅ Made in USA with proven Mossberg reliability
❌ Not California compliant (see our CA-legal options)
❌ 3-inch magnums kick hard – practice with target loads first
Who Should Buy This
Buy it if: You need a compact home defense tool that doesn’t require NFA paperwork, want Mossberg’s legendary reliability, or appreciate the SPX upgrades over base models.
Skip it if: You’re in a restricted state (check our state-compliant shotguns) or prefer traditional stocks (look at our tactical shotgun selection).
Frequently Asked Questions
Is the Mossberg 590 Shockwave SPX legal without a tax stamp?
Yes – the 14.38-inch barrel and 26.37″ overall length keep it classified as a firearm rather than a short-barreled shotgun under ATF rules.
What’s the difference between the SPX and standard Shockwave?
The SPX adds a heatshield, XS sights, and M-LOK compatible forend – upgrades worth the $50-75 premium based on my field testing.
Can I shoulder the Raptor grip?
ATF currently allows incidental shouldering, but consult a lawyer for legal advice in your jurisdiction.
Where can I buy the Mossberg 590 Shockwave SPX online?
F1Firearms (f1firearms.net) has them in stock with same-day shipping from Flagstaff, AZ.
What shells work best for home defense?
Federal FliteControl 00 buck patterns tightest in my tests – avoid birdshot for defensive use.
Does it come with a case?
Factory cardboard box only – we recommend our tactical cases for transport.
Can I add a pistol brace?
ATF rules change frequently – check current regulations before modifying.
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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Field tested on our private range with Federal, Remington, and Winchester ammunition. Measured patterns at 7/15/25 yards. This review reflects real-world performance, not marketing claims.
Last updated: May 2026
