Description

If you need a pump-action shotgun that handles short shells without fuss and keeps a compact profile for tight quarters, the Mossberg 590S Compact 12 Gauge Pump 18.5 inch Synthetic is a straight-shootin’ choice. This 12-gauge pump cycles 1.75-inch, 2.75-inch, or 3-inch shells right out of the box—no adapter needed. With an 18.5-inch barrel, black synthetic stock, and a drilled-and-tapped receiver, it’s built for home defense, range work, or duty carry. Priced at $601.4, it delivers Mossberg reliability in a handier package.

Manufacturer	Mossberg
Model	590S Compact
Material	Synthetic stock and forend (per manufacturer specs)
Compatibility	12 Gauge; accepts 1.75-inch, 2.75-inch, and 3-inch shells
Finish	Matte black (barrel, receiver, synthetic furniture)
Weight	Approx. 6.5 lbs (per Mossberg specifications)
Condition	New

Key Features

Mini-Shell Compatible Without Adapter — The 590S action cycles 1.75-inch mini shells, 2.75-inch standard, and 3-inch magnums straight from the magazine. Why it matters: you can load lower-recoil rounds for training or higher-capacity loads for defense without swapping parts.
18.5-Inch Barrel with Compact Overall Length — At just over 35 inches overall, this shotgun maneuvers easily in hallways, vehicles, or tight stands. Why it matters: a shorter barrel means faster shouldering and better control in close quarters.
Drilled-and-Tapped Receiver — The receiver comes pre-drilled and tapped for optics or ghost-ring sights. Why it matters: you can mount a red dot or peep sight for faster target acquisition without gunsmithing.
Black Synthetic Stock and Forend — Durable polymer resists weather, sweat, and bumps. Why it matters: no rust worries, no cracking in the cold, and a non-slip grip even with wet hands.
Dual Extractor and Positive Steel Ejector — Mossberg’s proven pump action uses dual extractors and a steel ejector for reliable cycling. Why it matters: fewer malfunctions under hard use, whether at the range or in a defensive scenario.

Who It’s For

The Mossberg 590S Compact is for the shooter who wants a no-nonsense pump gun that fits smaller frames or tight spaces. It’s suited for home defense, truck guns, and range plinking. If you’re a bird hunter who also keeps a shotgun by the bedside, this model bridges both worlds—light enough to carry afield, tough enough for duty. It also appeals to new shooters who want reduced recoil from mini shells without buying a separate adapter.

Pros and Cons

Pro: Cycles three shell lengths without any adapter—saves you $30–50 on aftermarket parts.
Con: The synthetic stock feels a bit utilitarian; if you prefer a more refined grip or adjustable comb, you’ll need to swap furniture.
Pro: Compact dimensions make it easy to store in a safe, under a bed, or in a vehicle console.
Con: The 18.5-inch barrel limits reach for longer-range bird or clay shooting; it’s best for close to medium distance.

Comparison

Feature	Mossberg 590S Compact	Remington 870 Express Compact	Winchester SXP Defender
Barrel Length	18.5 inches	18.5 inches	18 inches
Shell Compatibility	1.75, 2.75, 3 inches (no adapter)	2.75 and 3 inches only	2.75 and 3 inches only
Weight	~6.5 lbs	~6.75 lbs	~6.4 lbs
Receiver Pre-Drilled	Yes	No (requires drilling)	Yes
Price	$601.4	~$550	~$480

The 590S Compact’s main advantage is mini-shell compatibility out of the box—neither the Remington nor the Winchester offers that. The trade-off is a slightly higher price, but you won’t need to buy an adapter.

FAQ

Can I shoot 1.75-inch mini shells without any modification?

Yes. The Mossberg 590S Compact is designed to cycle 1.75-inch mini shells, 2.75-inch standard, and 3-inch magnum shells without needing an adapter. Just load and shoot.

Is the receiver drilled for a scope mount?

Yes, the receiver is drilled and tapped for optics. You can mount a red dot, ghost-ring sight, or scope using standard Mossberg 500/590 pattern bases.

What is the overall length of this shotgun?

Overall length is approximately 35.5 inches with the 18.5-inch barrel and synthetic stock. It’s compact enough for home defense or vehicle storage.

Does this model come with a pistol grip?

No, it comes with a standard synthetic pistol-grip stock and forend. The stock is a traditional field-style design, not a separate pistol grip.

Is the 590S Compact legal in all 50 states?

Generally yes, but check your local laws regarding barrel length (18.5 inches meets federal minimum). Some states have magazine capacity restrictions; the 590S Compact typically holds 6+1 rounds of 2.75-inch shells.

Ready to Order

This Mossberg 590S Compact 12 Gauge Pump 18.5 inch Synthetic is in stock and ready to ship. Priced at $601.4, it’s a reliable choice for anyone who wants a versatile pump gun that handles mini shells without adapters. Whether you’re setting up a home defense shotgun or building a truck gun, this one fits the bill.

✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
✅ 30-day returns
✅ Secure checkout

Last updated: April 2026

According to NSSF data, pump-action shotguns account for over 40% of shotgun sales in the U.S. annually, making the 590S Compact a popular choice in a well-established category.

Browse more Pump Action Shotguns or check our Home Defense Shotguns and Compact Shotguns.