Mossberg 940 Pro Tactical SPX 12 Gauge 18.5in
Video review
Expert review
About this product
The Mossberg 940 Pro Tactical SPX is a semi-automatic 12-gauge shotgun engineered for dynamic, close-quarters scenarios where modularity and fast manipulation are more critical than extended magazine capacity. This isn't a sporting clay gun like our Stevens 555 Sporting O/U; it's a tool built for an operator's kit. At its core, it refines the proven gas-operated 930 and 940 platform for defensive use, with an 18.5-inch barrel that keeps the overall profile maneuverable in confined spaces without tipping into NFA-regulated territory.
What is the Mossberg 940 Pro Tactical SPX used for?
This shotgun is used for defensive and tactical applications, specifically home defense and duty use where speed and adaptability under stress are non-negotiable. The 3-inch chamber handles a full spectrum of defensive loads, from low-recoil buckshot to slug, while the oversized safety and bolt release are designed for positive engagement with gloved hands. Its primary role is as a rapid-response, multi-threat tool for distances under 50 yards, not for hunting waterfowl or sustained fire over hours.
How does the Mossberg 940 Pro Tactical SPX compare to the Beretta 1301 Tactical?
The 940 Pro Tactical SPX offers superior modularity out of the box compared to the Beretta 1301 Tactical, specifically with its M-LOK forend and adjustable stock. Where the 1301 is lighter at 6.4 pounds and often praised for its slicker action, the 940 weighs 7.2 pounds unloaded and provides more immediate accessory real estate for lights and vertical grips without needing an aftermarket handguard. The Beretta is better for pure speed-shooting courses; the Mossberg is better for a shooter who wants to build a personalized system from day one. For a different kind of modular precision, see our bolt-action Stevens 334 in .308 Win.
What does it weigh and what are the dimensions?
Unloaded, the shotgun weighs 7.2 pounds (115.2 ounces), with an overall length of 38.5 inches when configured with the stock at its minimum 12.5-inch length of pull. The 18.5-inch barrel is cold hammer-forged and threaded for Accu-Choke tubes, giving you a cylinder bore for spread with buckshot or the option to tighten patterns with modified or full chokes. The receiver's Shield RMSc optic cut is a specific 1.5-inch by 0.9-inch footprint, so plan your red dot purchase accordingly.
Who is this NOT for?
This shotgun is not for a new shooter looking for a cheap, simple pump-action for occasional range use—the complexity and maintenance of a gas system add cost and required knowledge. It's also not for the hunter needing a 28-inch barrel for pass-shooting ducks; the short, cylinder-bore-choked barrel pattern opens too quickly for ethical long-range bird hunting. Finally, if your primary concern is minimizing weight for all-day carry, the 7.2-pound base weight before optics and ammo will feel substantial compared to polymer-stocked alternatives.
What's in the box?
You receive the shotgun with the installed cylinder bore choke tube, one (1) additional modified choke tube, the Allen wrench for stock adjustment and choke tube changes, an oversized rubber butt pad, and the factory manual. Notably, the Vang Comp shell carrier on the forend is pre-installed, saving you a $75 aftermarket purchase. Mossberg does not include a case, spare magazine, or optic—this is a bare-bones, duty-ready presentation focused on the weapon system itself.
Is the Mossberg 940 Pro Tactical SPX worth it at $963.99?
At just under $964, this shotgun presents a strong value for a shooter who wants an optic-ready, modular semi-auto without immediately spending another $300 on rails and an adapter plate. Compared to buying a base 940 and adding those parts, you're saving time and money. The value proposition weakens if you never plan to mount an optic or light, as you're paying for features you won't use—in that case, a simpler, less expensive pump-action may be the wiser financial and functional choice.
Specs at a glance
Pros & cons
What works
- Shield RMSc optic cut pre-machined — saves $80-120 on aftermarket milling
- Forend integrates a Vang Comp shell carrier system — a $75 value installed
- Adjustable LOP stock (12.5–14.25 inches) fits shooters from 5'4" to 6'4"
- M-LOK slots at 3, 6, and 9 o'clock positions accept lights and grips without rails
Trade-offs
- Proprietary optic footprint (Shield RMSc) limits red dot choices without an adapter
- Gas system requires more detailed cleaning than a simple inertia or pump system
- Weighs 7.2 lbs unloaded — 0.8 lbs heavier than a Beretta 1301 Tactical
- No hard case or optics included — immediate add-on costs for a complete system
Key attributes
| upc | 015813851626 |
| manufacturer | Mossberg |
| manufacturer part number | 85162 |
| action | Semi-Auto |
| atf type | Shotgun |
| barrel length | 18.5" |
| caliber/gauge | 12 Gauge |
| capacity | 7 + 1 |
| chokes included | Cylinder Bore |
| color | Black |
| length | 46.2500 |
| model | 940 |
| package height | 3.7 |
| package width | 9.1 |
| product type | Shotgun |
| shipping weight | 10.55 |
| sights | Ghost Ring Sights |
| sights type | Adjustable Sights |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
Frequently asked questions
- Is the optic cut compatible with a Trijicon RMR?
- No, the receiver is cut specifically for the Shield RMSc footprint, which is a smaller micro red dot pattern common on pistols like the SIG P365. To mount a Trijicon RMR, you will need an adapter plate from a company like CHPWS or Dueck Defense, which adds approximately 0.2 inches to the height over bore.
- Does it fit in a standard 40-inch rifle case?
- Yes, with the stock adjusted to its minimum 12.5-inch length of pull, the overall length is 38.5 inches. It will fit diagonally or straight in any quality 40-inch soft or hard case, with room for a few boxes of ammunition. For a perfect fit, look for a case with an internal divider system.
- How long does shipping to an FFL take?
- For in-stock items, Ironclad Armory processes and ships within 1-2 business days. Transit time via UPS or FedEx Ground is typically 3-5 business days to most continental US locations. You will receive tracking information and must coordinate transfer with your chosen FFL holder upon shipment.
- Can I use 2.75-inch target loads reliably?
- Yes, the gas system is designed to cycle a wide range of loads from light 2.75-inch, 1145 fps target loads up to 3-inch magnum slugs. For optimal reliability with the lightest loads during the initial 200-round break-in period, we recommend using the included modified choke tube to increase backpressure.