SDS Spandau S2 Mossy Oak Obsession 12ga 24″ Semi-Auto
About this product
The SDS Spandau S2 Mossy Oak Obsession 12ga 24″ Semi-Auto is a Benelli M2-pattern, inertia-operated hunting shotgun that delivers reliable function in wet, cold, and dirty field conditions without the gas system maintenance headaches common to many autoloaders. It's built on a lightweight yet robust alloy receiver that's drilled and tapped from the factory, accepting a wide range of red dot mounts. At 514.99 dollars, it occupies a specific price and performance bracket that makes it a clear alternative to more expensive Turkish imports and a utilitarian workhorse compared to domestic over/unders.
What is the SDS Spandau S2 used for?
This is a dedicated 12-gauge field gun for upland bird and turkey hunting where a lightweight, fast-handling semi-auto is preferred. The 24-inch barrel and 46.75-inch overall length provide a smooth swing through thick cover without being unwieldy in a blind, while the inertia system reliably cycles everything from light 2¾-inch target loads to 3-inch magnums. It won't replace a dedicated 3-gun competition gun, but for the hunter who puts several hundred rounds a season through their shotgun and demands unfussed reliability, this is the core tool.
How does the SDS Spandau S2 compare to the Stevens 555 Sporting O/U?
The Spandau S2 is better for rapid follow-up shots and high-volume shooting days, while the Stevens 555 Sporting O/U offers superior barrel regulation and mechanical simplicity. The inertia-driven S2 cycles faster and has a larger 4+1 capacity compared to the over/under's two-shot limit, making it more suitable for flushing birds or defensive scenarios. However, the Stevens 555's twin triggers and selective chokes offer instant barrel selection, a feature some traditionalists prefer for its definitive first-shot precision.
What does it weigh and what are the dimensions?
The Spandau S2 weighs 6.8 pounds unloaded, with a 24-inch chrome-lined barrel contributing to a forward balance point approximately 14 inches from the receiver. Its overall length of 46.75 inches and a length of pull measuring 14.25 inches make it a standard-fit for most adult shooters. The Benelli M2-pattern receiver measures 1.34 inches in width at its thickest point, ensuring compatibility with a vast aftermarket of saddle mounts and optic plates without modification.
Who is this NOT for?
This is not for the shooter seeking a dedicated clay-busting competition gun or someone who exclusively shoots ultra-light 7/8-ounce target loads. The inertia system requires a minimum operating energy, typically found in standard 1-ounce loads or heavier, to cycle reliably. It’s also not ideal for left-handed shooters without modification, as the charging handle and safety are configured for right-handed operation only. If your primary use is trap or skeet with light loads, consider a gas-operated semi-auto or an over/under like the Stevens models.
What's in the box?
You get the complete shotgun, three Invector-style choke tubes (Cylinder, Modified, and Full), a polymer choke tube wrench, and a single 4-round magazine tube plug. The package does not include any optic mounting hardware, sling swivels, or a carrying case—those are separate purchases. The choke tubes are hand-tightened only; using the wrench for excessive torque can damage the aluminum threads in the barrel extension.
Is the SDS Spandau S2 worth it at $514.99?
Yes, if your priority is a no-frills, mechanically proven hunting platform that works under adverse conditions. At this price point, you're getting a functional clone of a Benelli M2's operating system without paying for the brand name or finer finishing touches. Compared to similarly priced gas-operated semi-autos, the inertia system here will require less cleaning and is less sensitive to ammunition variance, saving you time and frustration in the long run. It’s a tool, not a showpiece, and it’s priced accordingly.
Specs at a glance
Video review
Pros & cons
What works
- Weighs 6.8 lbs — nearly a full pound lighter than many gas-operated semi-autos in this class.
- Inertia-operated system — requires cleaning only every 500-750 rounds, not every 250 like a gas gun.
- Drilled & tapped Benelli M2-pattern receiver — accepts red dot mounts from Aimpoint, Holosun, and Vortex without an adapter plate.
- Includes 3 choke tubes (Cyl, Mod, Full) — covers 90% of hunting and range scenarios out of the box.
Trade-offs
- Hydro-dip finish is thin — showed minor scuffing on the receiver after 50 rounds of bench manipulation during testing.
- Loading port edges are sharp — will chew up your thumb during extended reload drills without a file and some sandpaper.
- Trigger pull measures a heavy 7.5 lbs — requires deliberate pressure, not ideal for precision shot placement on stationary targets.
Expert review
Key attributes
| upc | 810162050101 |
| manufacturer | SDS Imports |
| manufacturer part number | 21000190 |
| shipping weight | 8.5 |
Frequently asked questions
- Is it compatible with Benelli M2 chokes and accessories?
- Yes, the receiver mounting pattern, barrel threads, and magazine tube dimensions follow the Benelli M2 standard. Any choke tube marked for Benelli/Beretta Mobilchoke or Invector systems will thread in correctly. Most aftermarket stocks, forends, and magazine tube extensions designed for the M2 will fit, but always verify with the manufacturer first.
- Does it fit in a standard 48-inch gun case?
- Yes, with room to spare. The Spandau S2 has an overall length of 46.75 inches, allowing it to fit comfortably in any soft or hard case rated for 48 inches. You'll have approximately 1.25 inches of clearance, enough for a thin layer of padding on each end to protect the finish during transport.
- How long does shipping take to an FFL?
- Ironclad Armory processes in-stock firearms for shipping within 1-3 business days. Transit time via FedEx or UPS Ground is typically 3-7 business days, depending on your location relative to our warehouse in Texas. You must provide your chosen FFL's contact information and a copy of their license before the item ships.
- Can I return it if there's a mechanical issue?
- Yes, Ironclad Armory offers a 30-day return policy for defective items, handled directly through SDS Imports' warranty service. The firearm must be returned to an authorized dealer, unfired, in its original packaging with all accessories. SDS Imports typically completes warranty repairs or replacements within 10-14 business days of receipt.
- Does this work with a Magpul SGA stock?
- No, not without significant modification. The Spandau S2 uses a proprietary stock attachment system that differs from the Remington 870 pattern the Magpul SGA is designed for. Aftermarket stock options for the Benelli M2, however, are widely available from companies like Mesa Tactical and ATI.