Mossberg 590
The Mossberg 590 is the duty-grade step up from the standard Mossberg 500 — heavier construction, a larger magazine tube, metal trigger guard, and military specification components that meet the requirements of US military contracts. The 590 has been issued to US armed forces and law enforcement agencies for decades, making it one of the most proven tactical shotguns in service.
Read our full Mossberg 590 Buying Guide ↓
590 vs. 500: What Justifies the Upgrade?
The Mossberg 590 improves on the 500 in several ways relevant to duty and tactical use. The magazine tube is larger, allowing 8+1 or 9+1 capacity versus the 500's 5+1 or 6+1 standard. The 590 uses a metal trigger guard and safety instead of the 500's polymer components — more durable under hard use. The barrel on the 590 is retained by a magazine cap rather than a barrel screw, which Mossberg considers more reliable under sustained fire. For home defense and range use, the 500 is entirely adequate. For duty, military, or high-volume use, the 590's upgrades are meaningful.
Mossberg 590A1: The Military-Spec Version
The 590A1 is Mossberg's most heavy-duty pump-action — built to and exceeding US military specifications including MIL-S-3443. It adds a heavy-wall barrel, front and rear metal sights, a bayonet lug, and Parkerized finish. The 590A1 passed the US Army's pump-action shotgun trials — the most rigorous pump shotgun testing conducted by any US government agency. For buyers who want the toughest production pump-action shotgun available, the 590A1 is the definitive choice.
Mossberg 590 Shockwave: The Non-NFA Option
The 590 Shockwave uses a 14-inch barrel and Raptor bird's head grip, configured from the factory as a "firearm" under the NFA rather than a shotgun — meaning it does not require NFA registration or a tax stamp despite its short overall length. It has a dedicated following for vehicle carry and ultra-compact home defense applications.
Ammunition Capacity and Magazine Extensions
The standard Mossberg 590 ships with 8+1 capacity in 12 gauge with 2¾-inch shells. Magazine tube extensions are available for shooters who want maximum capacity. For home defense, 8+1 of 00 buckshot provides substantial capacity for any realistic defensive scenario.
Frequently Asked Questions
What is the difference between the Mossberg 590 and 590A1?
The 590A1 adds a heavy-wall barrel, metal sights, bayonet lug, and Parkerized finish to meet military specifications. The standard 590 is less expensive and adequate for most tactical and defensive applications. The 590A1 is worth the premium for buyers who want the most durable production pump shotgun available.
Is the Mossberg 590 good for home defense?
Yes — the Mossberg 590 loaded with 00 buckshot is one of the most effective home defense firearms available. Its pump-action reliability means it functions with any ammunition, and its capacity is more than sufficient for any realistic defensive scenario.
Does Impact Guns carry the Mossberg 590?
Yes. Impact Guns carries the Mossberg 590, 590A1, and 590 Shockwave and ships nationwide. See our Mossberg brand page for the full lineup.
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See Also
Remington 870 • Pump Shotguns • Home Defense Guns • Weapon Mounted Lights