
Availability: In Stock
The Mossberg 590A1 is a 12-gauge pump-action shotgun built for serious duty work, home defense, and tactical applications where reliability under pressure matters most. This is a true defensive platform—the kind of shotgun trusted by law enforcement and military for decades—now available in the practical 9-shot configuration with a 20-inch barrel and fixed 14.25-inch length of pull. The 590A1 carries the legacy of one of the most battle-tested shotgun designs in the world, engineered for users who demand a no-nonsense gun that cycles anything and keeps running when it counts.
What sets the 590A1 apart is its reinforced receiver and trigger group, along with a cross-bolt safety and simple controls you can operate in any condition. The 3-inch chamber gives you flexibility with standard and magnum loads, while the cylinder bore choke keeps your shot pattern consistent for close-quarters use. A basic bead sight keeps your sight picture clear and uncomplicated. At 7.25 pounds and 41 inches overall, it's hefty enough to absorb recoil without being unwieldy in tight spaces—the weight you want when you're running the gun hard.
The parkerized barrel finish and synthetic black stock are built to work, not to impress. They resist corrosion, shrug off the elements, and won't need fussing over between uses. The synthetic furniture is durable and low-maintenance, perfect for hunters, sport shooters, and anyone who values a gun that goes to work and gets the job done. This is a shotgun that earns its place in a truck bed, a bedside safe, or a patrol setup.
| Gauge | 12 |
| Capacity | 9 rounds |
| Chamber | 3 inch |
| Barrel Length | 20 inches |
| Choke | Cylinder bore |
| Sights | Bead |
| Barrel Finish | Parkerized |
| Stock Finish | Synthetic black |
| Length of Pull | 14.25 inches (fixed) |
| Overall Length | 41 inches |
| Weight | 7.25 pounds |
| Model Number | 51660 |
The 590A1 chambers 3-inch 12-gauge ammunition, so you can load both standard 2.75-inch and magnum 3-inch shells. The cylinder bore choke works with any 12-gauge load you choose to run.
Yes. The 590A1 is purpose-built for defensive work with a short 20-inch barrel for indoor handling, a 9-round magazine for capacity, and proven reliability in high-stress situations. The fixed 14.25-inch length of pull is standard for most adult shooters in a ready position.
The 590A1 features a reinforced receiver and enhanced trigger group for increased durability and performance in demanding applications. It's the upgraded platform trusted in military and law enforcement use.
We don't have detailed accessory rail or mounting information in our current specs. Contact our team for guidance on aftermarket upgrades and compatibility with this model.

SKU: 120913331 • Width: 8in • Height: 2.3in • Depth: 42.6in • Weight: 9.5oz





Availability: In Stock
The Mossberg 590A1 is a 12-gauge pump-action shotgun built for serious duty work, home defense, and tactical applications where reliability under pressure matters most. This is a true defensive platform—the kind of shotgun trusted by law enforcement and military for decades—now available in the practical 9-shot configuration with a 20-inch barrel and fixed 14.25-inch length of pull. The 590A1 carries the legacy of one of the most battle-tested shotgun designs in the world, engineered for users who demand a no-nonsense gun that cycles anything and keeps running when it counts.
What sets the 590A1 apart is its reinforced receiver and trigger group, along with a cross-bolt safety and simple controls you can operate in any condition. The 3-inch chamber gives you flexibility with standard and magnum loads, while the cylinder bore choke keeps your shot pattern consistent for close-quarters use. A basic bead sight keeps your sight picture clear and uncomplicated. At 7.25 pounds and 41 inches overall, it's hefty enough to absorb recoil without being unwieldy in tight spaces—the weight you want when you're running the gun hard.
The parkerized barrel finish and synthetic black stock are built to work, not to impress. They resist corrosion, shrug off the elements, and won't need fussing over between uses. The synthetic furniture is durable and low-maintenance, perfect for hunters, sport shooters, and anyone who values a gun that goes to work and gets the job done. This is a shotgun that earns its place in a truck bed, a bedside safe, or a patrol setup.
| Gauge | 12 |
| Capacity | 9 rounds |
| Chamber | 3 inch |
| Barrel Length | 20 inches |
| Choke | Cylinder bore |
| Sights | Bead |
| Barrel Finish | Parkerized |
| Stock Finish | Synthetic black |
| Length of Pull | 14.25 inches (fixed) |
| Overall Length | 41 inches |
| Weight | 7.25 pounds |
| Model Number | 51660 |
The 590A1 chambers 3-inch 12-gauge ammunition, so you can load both standard 2.75-inch and magnum 3-inch shells. The cylinder bore choke works with any 12-gauge load you choose to run.
Yes. The 590A1 is purpose-built for defensive work with a short 20-inch barrel for indoor handling, a 9-round magazine for capacity, and proven reliability in high-stress situations. The fixed 14.25-inch length of pull is standard for most adult shooters in a ready position.
The 590A1 features a reinforced receiver and enhanced trigger group for increased durability and performance in demanding applications. It's the upgraded platform trusted in military and law enforcement use.
We don't have detailed accessory rail or mounting information in our current specs. Contact our team for guidance on aftermarket upgrades and compatibility with this model.
SKU: 120913331 • Width: 8in • Height: 2.3in • Depth: 42.6in • Weight: 9.5oz
