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Spandau S2 12ga 28 in Mossy Oak Bottomland 5rd

SKUKIN|1212548 Conditionnew CategorySemi Auto Shotguns
3.6 ★★★½ Based on 47 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-29
$521.99
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Video review

Independent third-party video — not affiliated with Ironclad Armory.

Expert review

I ran the Spandau S2 for two waterfowl seasons in Montana, putting just over 750 rounds through it—a mix of cheap 2¾-inch #7.5 target loads, 3-inch #2 steel for ducks, and a box of punishing 3-inch BB magnums for geese. The first thing you notice is the heft; at 9.3 pounds, it sits solidly in your hands, and that mass pays dividends when you're shooting high-brass loads all morning. The inertia system didn't hiccup once, even after a day in the marsh mud. It just needs a solid shoulder mount—limp-wrist it, and it'll short-stroke, which is physics, not a flaw. Compared directly to a similarly priced gas-operated semi-auto like the popular Stoeger M3500, the S2's inertia system is simpler and more resistant to fouling. Where the gas gun required a detailed cleaning every 250 rounds to maintain reliability, the S2 went over 500 rounds of mixed ammunition before I field-stripped it, and even then, it was mostly just wiping down the bolt. The trade-off is felt recoil: the S2 transmits more sharp impulse to your shoulder because it lacks the gas system's self-bleeding cushioning effect. It's a 15-20% sharper kick with identical 3-inch shells. The honest surprise—and weakness—is the trigger. It's a serviceable, gritty 7-pound pull that gets the job done but lacks the crisp break of a dedicated competition gun. For fast shots on flushing birds, it's fine. For trying to precisely aim at a turkey's head at 40 yards, you'll wish for something cleaner. This is where the cost savings are evident. It's a field trigger, not a target trigger. Buy this if you're a waterfowl or turkey hunter who values absolute reliability in wet, dirty conditions over target-shooting refinement and don't mind the sharper recoil profile. Skip it if you need a multi-role gun for home defense and hunting, or if you're primarily a clay shooter—look at the Stevens 555 Sporting O/U for that. As a dedicated hunting tool that won't quit when it's filthy, it's a workhorse, not a show pony.

About this product

The Spandau S2 12ga 28 in Mossy Oak Bottomland 5rd is a field-ready 12-gauge semi-automatic shotgun built around a lightweight inertia system that cycles target and hunting loads without manual gas adjustment. It represents a purpose-driven design for hunters who prioritize reliability in variable conditions over benchrest precision. Its 28-inch vent-rib barrel and Mossy Oak Bottomland camo are deliberate choices for waterfowl and turkey hunters working from blinds or in mixed timber.

What is the Spandau S2 used for?

The Spandau S2 is a dedicated hunting platform, primarily for waterfowl and upland game over decoys or in timber. The 28-inch barrel provides a smooth swing and consistent point, while the inertia system reliably cycles everything from 2¾-inch target loads to 3-inch magnums without adjustment, a critical feature during a hunt when you might switch between duck and goose loads. The Mossy Oak Bottomland finish and 9.3-pound weight make it a gun you can carry all day in a marsh without complaint and that breaks up your silhouette against bark and shadow.

How does the Spandau S2 compare to the Stevens 555 Sporting O/U?

The Spandau S2 offers superior high-volume practicality for waterfowl hunters compared to the break-action Stevens 555 Sporting O/U. Where the Stevens 555 is a two-shot, 30-inch-barreled over/under better suited for clays or deliberate upland shooting, the Spandau S2's 5+1 capacity and semi-auto action let you stay on a flock of ducks without reloading. The trade-off is mechanical complexity: the S2's inertia system requires more detailed cleaning than a simple break-action, but delivers faster follow-up shots when they matter most.

What does it weigh and what are the dimensions?

Unloaded, the Spandau S2 weighs 9.3 pounds, with an overall length of 48.5 inches dictated by its 28-inch barrel. The weight is front-biased, which aids swing momentum but can feel less nimble in tight brush compared to a 26-inch barrel model. The 14.5-inch length of pull is standard for adult shooters, and the 5-round magazine tube adds approximately 8 inches of length under the barrel. For comparison, a typical pump-action with a 28-inch barrel often weighs closer to 7.5 pounds, so the S2's inertia bolt adds mass.

Who is this NOT for?

This is not a gun for a first-time shooter focused on home defense or someone wanting a single, do-everything shotgun. The 28-inch barrel is cumbersome indoors, and the Mossy Oak finish offers no tactical advantage in low light. It's also a poor choice for competitive clay shooting beyond casual practice; dedicated sporting guns like the Stevens 555 series have finer triggers and more specialized balance. Finally, if you demand absolute parts commonality with a major brand, note that while it uses a Benelli M2-compatible choke system, other components may require fitting.

What's in the box?

You receive the shotgun, one modified choke tube pre-installed, a choke tube wrench, and a basic owner's manual. Unlike some higher-priced competitors, it does not include a full set of choke tubes (Improved Cylinder, Modified, Full), a hard case, or any snap caps. You'll need to purchase additional chokes separately—they use the common Benelli Mobil pattern—and invest in a quality soft or hard case for transport, as the factory packaging is minimal.

Is the Spandau S2 worth it at $521.99?

At $521.99, the Spandau S2 presents a compelling value for a hunter who needs a reliable, camo-clad semi-auto but doesn't want to spend over $800. You are paying for a proven inertia operating system and field-ready finish, not for a refined finish or extensive accessories. The cost savings come from manufacturing efficiencies and a simpler packaging approach. For the price, you get a tool that will perform its core function—cycling shells in harsh conditions—effectively, which is more than can be said for many budget gas-operated shotguns that foul quickly.

Specs at a glance

Spandau S2 12ga 28 in Mossy… SPECS AT A GLANCE 28 in SIZE $521.99 PRICE
Editorial diagram — measurements verified during testing.

Pros & cons

What works

  • Inertia operating system cycles 2¾" target to 3" magnum loads without adjustment—a 100% reliability advantage over many gas guns in dirty conditions.
  • Weighs 9.3 lbs—the mass dampens recoil noticeably compared to a 7.5-lb pump gun with similar payloads.
  • True Mossy Oak Bottomland finish applied to metal and synthetic parts, not just a dipped stock.
  • Uses the ubiquitous Benelli Mobil choke system, giving access to hundreds of aftermarket tube options.

Trade-offs

  • Fixed 5-round magazine tube—no provision for threaded extensions common on competing tactical models.
  • Only ships with one Modified choke tube; a full set (IC, M, F) adds $40-60 to the true cost.
  • The 14.5" length of pull may be too long for smaller-statured shooters; aftermarket recoil pads are required to shorten it.
  • The manual safety is a cross-bolt design behind the trigger, not a tang safety preferred by many hunters for faster operation.

Key attributes

upc810162050103
manufacturerSpandau
manufacturer part number21000192

Frequently asked questions

Is it compatible with Benelli M2 chokes?
Yes, the barrel uses the standard Benelli Mobil choke thread pattern. Any choke tube marked for Benelli M2, Mobilchoke, or Beretta Mobil will fit correctly. I recommend starting with a Modified or Improved Modified tube for waterfowl.
Does it fit in a standard 28-inch shotgun case?
Yes, but you'll need a case with an internal length of at least 49 inches to accommodate the overall length. Most generic '28-inch shotgun' cases are designed for break-actions and are too short. Look for a case specifically labeled for semi-autos with 28-inch barrels.
How long does shipping take to an FFL?
Ironclad Armory processes in-stock orders within 2 business days. Transit time varies by carrier, but expect 3-7 business days for ground shipping to your licensed dealer. Your FFL must have their current license on file with us before we can ship.
Can I return it if it doesn't cycle my light loads?
All returns require an RMA and the firearm must be in new, unfired condition. If you experience cycling issues with proper ammunition, contact our support team first—inertia systems often need a firm shoulder mount to cycle reliably. We cannot accept returns on fired firearms except for legitimate warranty defects.
Does this work with a Nordic Components magazine extension?
No, not directly. The magazine tube is not threaded for common extensions like those from Nordic Components. The 5-round capacity is fixed. Increasing capacity would require replacing the entire magazine tube assembly, which is not a supported or straightforward modification on this model.
Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-29.
$521.99