Mossberg 590A1 Pro 12GA 18.5in Tungsten Cerakote Magpul 6+1
About this product
What is the Mossberg 590A1 Pro? It's a 12-gauge, pump-action defensive shotgun purpose-built with heavy-walled components and an 18.5" barrel to the MIL-SPEC 3443E durability standard. It balances a 6+1 magazine capacity with a 9.65 lb mass, making it 2.3 lb heavier than the standard Mossberg 590. The Tungsten Cerakote finish and Magpul SGA furniture provide a corrosion-resistant, user-configurable platform for high-round-count drills and adverse-condition deployment.
What is the Mossberg 590A1 Pro used for?
The Mossberg 590A1 Pro is primarily a duty-grade defensive weapon. Its heavy-walled barrel and dual extractors are engineered for sustained reliability with high-pressure defensive and slug ammunition. The metal ghost-ring sights and 19-inch sight radius provide rapid, repeatable target acquisition for home defense and tactical training. This is not a lightweight upland gun; it’s designed to withstand thousands of rounds in demanding conditions without degradation.
How does the Mossberg 590A1 Pro compare to the Stevens 555 Sporting O/U?
The 590A1 Pro offers superior durability and modularity for defense, while the Stevens 555 Sporting O/U is better for clay sports. The Mossberg’s 9.65 lb weight and fixed 18.5" barrel make it more stable for rapid slug or buckshot strings, whereas the Stevens’s 6.75 lb weight and dual-barrel design prioritize smooth swing and pointability. For shooting 3" magnum shells in volume, the 590A1's steel-on-steel action and pressure-bearing components will outlast the break-action design.
What does it weigh and what are the dimensions?
The shotgun weighs 9.65 lb (4370 grams) and has an overall length of 38.5 inches (978 mm). With the Magpul SGA stock fully collapsed, the length of pull adjusts down to 12.5 inches, making it manageable for smaller-statured shooters. The 18.5-inch barrel keeps the firearm at a non-NFA overall length, allowing for immediate configuration without federal waiting periods or tax stamps.
Who is this NOT for?
This shotgun is not for the occasional clay shooter or someone prioritizing weight over durability. The 9.65 lb mass makes prolonged off-hand shooting tiring compared to a Stevens 555 Sporting Compact. The 6+1 capacity also makes it a poor choice for three-gun competition where extended tubed shotguns dominate. If your primary use is hunting waterfowl or upland birds, a lighter, longer-barreled firearm will serve you better.
What's in the box?
You receive the complete shotgun with the Magpul SGA stock installed, three stock spacers for LOP adjustment, and a Magpul enhanced buttpad. Mossberg includes a standard trigger lock, a manual, warranty card, and a standard 5-round polymer magazine follower. A 10-minute assembly is typically required to install the spacers to your preferred LOP and verify sight alignment.
Is the Mossberg 590A1 Pro worth it at $1025.99?
Yes, at $1025.99, it’s worth it for buyers needing a duty-grade, all-metal defensive shotgun with enhanced corrosion protection. The Cerakote application alone adds $150-$200 in aftermarket value and prevents wear from salt, sweat, and harsh cleaners. For a shooter who will subject the firearm to high-volume training—1,000+ rounds a year—the heavy-walled construction justifies the premium over a standard 590. If your use is purely occasional home storage, a less expensive model may suffice.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 9.65 lb (4370g) — 2.3 lb heavier than standard 590 for reduced felt recoil
- Tungsten Cerakote finish provides 500+ hour salt spray corrosion resistance per ASTM B117
- Metal ghost-ring sights offer 19-inch sight radius for precise slug placement at 50 yards
- Dual extractors and heavy-walled barrel meet MIL-SPEC 3443E for sustained firing
Trade-offs
- No factory-installed sling swivel studs — requires $35 adapter kit for single-point sling
- Standard capacity is 6+1 — competitors like the Beretta 1301 Tactical offer 7+1 in similar OAL
- Heavy-walled barrel profile limits aftermarket barrel options compared to standard 590 series
Expert review
Key attributes
| upc | 015813507950 |
| manufacturer | Mossberg |
| manufacturer part number | 50795 |
| action | Pump Action |
| atf type | Shotgun |
| barrel length | 18.5" |
| caliber/gauge | 12 Gauge |
| capacity | 6 + 1 |
| chokes included | Cylinder Bore |
| package height | 2.7 |
| package width | 8.0 |
| product type | Shotgun |
| safety | Ambidextrous |
| shipping weight | 9.65 |
| sights | Ghost Ring Sights |
| sights type | Adjustable Sights |
Frequently asked questions
- Is it compatible with Mossberg 500/590 barrels?
- No, it is not directly compatible with standard Mossberg 500 or 590 barrels due to its heavy-walled barrel profile. The receiver threads and barrel lug are designed specifically for the 590A1 series. Attempting to install a standard barrel can cause headspace issues and is not recommended. You must source 590A1-specific barrels, which are cataloged separately by Mossberg.
- Does the Magpul SGA stock fit a standard 590?
- Yes, the Magpul SGA stock is adaptable to standard Mossberg 500, 590, and 590A1 receivers without modification. Installation requires a standard 1/2" socket wrench and takes about 5 minutes. This allows you to standardize ergonomics if you own multiple Mossberg pump-action shotguns across different models.
- Can I install a sidesaddle shell carrier?
- Yes, the receiver is drilled and tapped for a standard 6-48 scope base pattern, allowing direct mounting of most polymer or aluminum shell carriers like the Mesa Tactical Sureshell or GG&G models. Remove the factory-installed protective screws with a Torx T15 bit; the mounting process adds 3.2 oz to the firearm's unsupported left side.
- How long does shipping take for NFA items?
- Ironclad Armory ships non-NFA items within 2 business days via FedEx. For NFA items like SBS conversions, the firearm ships to your local SOT after your Form 4 is approved, a process currently averaging 180-240 days through the ATF eForms system. Always consult our NFA blog for current processing time estimates and state-specific guidance.
- Does it work with the Magpul M-LOK forend?
- No, it uses Mossberg's proprietary action slide tube assembly integrated with the heavy-walled barrel. The Magpul M-LOK forend is designed for the standard Mossberg 500/590 series with a separate action tube. Mounting accessories requires either an aftermarket clamp-on rail system from Nordic Components or direct attachment to the factory 6-slot Picatinny rail section.