Description
There is a reason the 590A1 name carries so much weight. The 590A1 series is the only pump action to pass the military's brutal Mil-Spec 3443 testing, and this 14-inch model brings all of that overbuilt construction to a short barrel shotgun that handles like a dream in tight quarters. You get the heavy-walled barrel, metal trigger guard, metal safety button, and durable Parkerized finish that separate the 590A1 from lighter duty pump guns, all in a package that measures just 33.75 inches end to end and weighs 6.75 pounds.
Why the 14" 590A1 Earns Its Keep
Shortening the barrel did not cost you anything at the loading gate. This model keeps the full 5+1 capacity of its longer siblings, and the fixed black synthetic stock carries four more shells in an onboard holder plus a storage compartment in the buttstock. The strapped forend is a smart touch on a barrel this short, keeping your support hand planted and clear of the muzzle when you are running the action hard. Ghost ring sights round out the setup, giving you a big, fast rear aperture that gets you on target quickly and stays usable in low light, with adjustability to dial in your preferred load.
Built Like Every Other 590A1, Which Is the Point
Under the hood you get all the features that made this platform the pump gun of choice for military and law enforcement agencies for decades: dual extractors, twin action bars, positive steel-to-steel lockup, an anti-jam elevator, and the tang-mounted ambidextrous safety that Mossberg fans swear by. The magazine tube has a clean-out cap for easy maintenance, and the 3-inch chamber runs everything from light target loads to full-power buckshot and slugs through the cylinder bore barrel.
This is the shotgun for someone who wants maximum maneuverability without stepping down to a bare-bones firearm. Short, stout, and dead reliable, the 590A1 SBS is about as purpose-built as a defensive pump gun gets.
Key Specifications
- Model: 590A1 Class III
- Manufacturer Part Number: 51689
- UPC: 015813516891
- Gauge: 12 Gauge
- Chamber: 3"
- Action: Pump Action
- Barrel Length: 14" Heavy-Walled
- Choke: Cylinder Bore
- Capacity: 5+1
- Sights: Adjustable Ghost Ring
- Stock: Black Synthetic, Fixed, with +4 Shell Holder and Storage Compartment
- Finish: Parkerized
- Overall Length: 33.75"
- Length of Pull: 13.87"
- Weight: 6.75 lbs
- Product Type: NFA Short Barrel Shotgun
What’s Included
- Mossberg 590A1 14" SBS shotgun
- Fixed synthetic stock with integrated 4-shell holder and storage compartment
- Owner's manual
Frequently Asked Questions
What ammo can the Mossberg 590A1 SBS handle?
It has a 3-inch chamber, so it runs both 2.75-inch and 3-inch 12 gauge shells. The cylinder bore barrel is well suited to buckshot and slugs, which is exactly what a defensive shotgun like this is built around. The heavy-walled barrel shrugs off high round counts of full-power loads.
Does the shorter barrel reduce the capacity on this 590A1?
No, that is one of the best parts of this configuration. The 14-inch model keeps the same 5+1 capacity as longer 590A1 six-shot models, and the stock-mounted shell holder carries four extra rounds on the gun. You get a much shorter, handier package without giving up firepower.
Are the ghost ring sights on the 590A1 adjustable?
Yes, the ghost ring setup is adjustable so you can zero it to your preferred slug or buckshot load. The large rear aperture is fast to pick up and works well in low light, which is a big step up from a plain bead for defensive use. Plenty of owners find it noticeably quicker on target at typical indoor distances.
What is the strap on the forend for?
With a 14-inch barrel, the muzzle sits much closer to your support hand than on a standard shotgun. The forend strap keeps your lead hand anchored and safely behind the muzzle while you cycle the pump under stress. It is a simple feature, but it makes a real difference when running the gun fast.





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