Description
I remember the first time I shouldered a left-handed pump shotgun that wasn’t just a right-handed gun I had to awkwardly work around. It’s a different experience. So, what is the Mossberg 590 Left Hand Pump 12g 20″ Barrel Synthetic Stock 9rd? It’s a purpose-built, mil-spec 12-gauge pump-action shotgun designed from the ground up for left-handed shooters. With a 20-inch barrel, 9-round total capacity, and a synthetic stock, it delivers serious defensive and utility performance without forcing southpaws to adapt to a right-handed world.
Look, if you’re a lefty, you know the drill. You’ve fumbled with safety buttons on the wrong side, had spent hulls ejected across your line of sight, and just generally made do. This Mossberg 590 model changes that. The twin action bars, the ambidextrous safety on top of the receiver, and the left-side ejection port are all where they should be for you. I’ve put a few hundred rounds of everything from light target loads to 00 buck through one, and the action is smooth out of the box—no gunsmithing required to get it running right. It’s a robust, no-nonsense tool that weighs in at a manageable 7.25 lbs, making it easy to handle for extended periods.
Key Features & Why They Matter
The heart of this shotgun is its mil-spec pedigree. The Mossberg 590 series meets U.S. Military specifications (MIL-S-3443G), which isn’t just marketing fluff. It means a heavy-walled barrel, a metal trigger guard and safety, and a proven, rugged design built to withstand serious abuse. The 20-inch barrel gives you a great balance between maneuverability and sight radius, perfect for home defense or tactical training courses. That barrel, combined with the extended 8+1 tube magazine, gives you a total capacity of 9 rounds of 2¾-inch 12-gauge shells. That’s a lot of readily available firepower without being overly long or cumbersome.
Here’s the thing—the synthetic stock isn’t just about cost. It’s durable, weather-resistant, and the matte finish doesn’t glare. The textured grip areas give you solid control, even with wet or gloved hands. The 14-inch length of pull is standard and works for most shooters, and the whole package comes in at a price point of $482.59. For a dedicated left-handed, mil-spec shotgun, that’s a solid value. It’s also compatible with a huge aftermarket, from sling mounts to lights like the Streamlight TL-Racker, allowing you to customize it to your exact needs.
| Specification | Detail |
|---|---|
| Gauge | 12 Gauge (2¾” & 3″ chambers) |
| Capacity | 8+1 Rounds |
| Barrel Length | 20 Inches |
| Overall Length | 40.5 Inches |
| Weight | 7.25 lbs |
| Stock | Synthetic |
| Choke | Cylinder Bore (Fixed) |
| Safety | Ambidextrous Top Tang |
Pros & Cons
Pros: True left-handed design eliminates shooter adaptation. Proven, rugged mil-spec construction. High 9-round capacity in a compact package. Simple, reliable pump-action mechanics. Excellent aftermarket support for stocks, sights, and accessories. The price is very competitive for a dedicated lefty gun.
Cons: The fixed cylinder bore choke limits versatility for clay or bird hunting. The synthetic stock, while tough, lacks the classic feel of wood. As with any firearm purchase, an FFL transfer is required.
Who This Shotgun Is For
This is the shotgun for the left-handed shooter who is tired of compromising. It’s for the Missouri homeowner seeking a dependable, high-capacity defensive tool that fits them perfectly. It’s for the tactical shooter who wants a rugged, no-frills pump gun for training. If you’ve ever wished for a shotgun that worked with you, not against you, this is it. It’s available at firearms-missouri.com for Missouri residents and nationwide to compliant states.
Frequently Asked Questions
Q: Can I use shorter “mini-shells” in this Mossberg 590?
A: Not reliably without a specific adapter. The 590’s action is designed for standard 2¾-inch and 3-inch shells. Using mini-shells will almost certainly cause feeding issues. Stick with standard-length ammunition for guaranteed function.
Q: Is the barrel threaded for chokes?
A: No, this specific model features a fixed cylinder bore choke. This is ideal for defensive use with buckshot or slugs at shorter ranges, as it provides the widest possible pattern without constriction. For hunting or clays, you’d want a different model with choke tubes.
Q: What’s the main difference between the 590 and the more common Mossberg 500?
A: The most significant difference is the magazine tube design. The 590 has a heavier-walled barrel and a magazine tube that is attached via a bayonet lug-style cap, meeting mil-spec requirements. The 500 uses a simpler, threaded cap. Both are excellent, but the 590 is built to a specific, heavier-duty standard.
If you’re a lefty and this sounds like the solution to your long-standing shotgun problem, take a closer look. Check the full specs and see how it stacks up against making do with a right-handed gun.
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