Description
The Mossberg 590A1 Pro 12 Gauge 18.5-inch Marinecote 6+1 is a professional-grade pump-action shotgun built to handle the toughest environments. With a corrosion-resistant Marinecote finish and heavy-walled barrel, this shotgun delivers reliable performance in wet, humid, or salty conditions. It’s a go-to choice for home defense, law enforcement, and anyone who demands durability from their firearm.
| Manufacturer | Mossberg |
|---|---|
| Model | 590A1 Pro |
| Material | Steel receiver, synthetic stock |
| Compatibility | 12 Gauge 2.75″ and 3″ shells |
| Finish | Marinecote (corrosion-resistant) |
| Weight | Approximately 7.25 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- Heavy-Walled 18.5″ Barrel with Marinecote Finish: Why it matters — The Marinecote finish resists rust and corrosion, so you can trust this shotgun in rain, fog, or coastal air without constant oiling.
- Optic-Ready Steel Receiver with Ghost-Ring Sights: Why it matters — You get fast target acquisition with the fiber-optic front and ghost-ring rear, plus the ability to mount a red dot or scope for precision shooting.
- Black Synthetic Adjustable Stock: Why it matters — The length of pull adjusts to fit different shooters, making it comfortable for family members of varying sizes or for use with heavy clothing.
- Dual Extractors and Twin Action Bars: Why it matters — These proven features ensure smooth cycling and reliable ejection, reducing the chance of jams when you need the gun to work.
- Anti-Jam Elevator: Why it matters — Prevents shell hang-ups during fast reloads, keeping the action running cleanly under stress.
Who It’s For
This shotgun is designed for shooters who want a no-compromise pump action for home defense, duty use, or outdoor adventures. It’s a solid choice for families learning to shoot because the adjustable stock fits multiple users, and the simple pump action is easy to teach. Beginners will appreciate the reliability, while experienced shooters will value the military-spec durability.
Pros & Cons
- Pro: Marinecote finish offers exceptional corrosion resistance — ideal for humid or wet climates.
- Pro: Adjustable stock allows a custom fit for different shooters, from youth to adults.
- Pro: Ghost-ring sights and optic-ready receiver give you flexibility for fast or precise aiming.
- Con: The heavy-walled barrel adds weight (about 7.25 lbs), which may feel heavy for smaller shooters during extended use.
Comparison
| Feature | Mossberg 590A1 Pro | Remington 870 Police Magnum | Benelli Nova Tactical |
|---|---|---|---|
| Barrel Length | 18.5″ | 18″ | 18.5″ |
| Finish | Marinecote (corrosion-resistant) | Parkerized | Matte black |
| Stock | Adjustable synthetic | Fixed synthetic | Fixed synthetic |
| Capacity | 6+1 | 6+1 | 4+1 |
| Weight | ~7.25 lbs | ~7.5 lbs | ~7.2 lbs |
| Optic Ready | Yes (steel receiver) | No | No |
FAQ
What is the capacity of the Mossberg 590A1 Pro?
It holds 6 shells in the magazine tube plus one in the chamber, for a total of 6+1 rounds of 12 gauge ammunition.
Can I mount a red dot on this shotgun?
Yes, the steel receiver is drilled and tapped for optics, so you can mount a red dot, reflex sight, or low-power scope without an adapter.
Is the Marinecote finish really better than blued steel?
Marinecote is a corrosion-resistant coating that withstands saltwater, humidity, and sweat better than blued or parkerized finishes. Per Mossberg specs, it’s designed for marine and tactical use where rust is a concern.
Does the stock adjust without tools?
Yes, the synthetic stock uses a simple adjustment mechanism to change length of pull — no tools required. This makes it easy to fit the shotgun to different shooters quickly.
Is this shotgun legal for home defense?
Yes, the 18.5″ barrel and overall length meet federal and most state requirements for a non-NFA shotgun. Always check your local laws, as some states have magazine capacity restrictions.
Trust & Service
- ✅ Nationwide delivery to all 50 states
- ✅ Ships within 1-2 business days
- ✅ 30-day return policy
- ✅ Secure checkout with encryption
Related Categories
Explore more in our Pump Action Shotguns or check out Home Defense Shotguns and Mossberg Shotguns.
Last updated: April 2026
According to industry data, over 60% of law enforcement agencies in the U.S. use Mossberg shotguns as standard issue.
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