Spandau S2 12 Gauge Semi-Auto 24 in. Mossy Oak
Pros & cons
What works
- Weighs 6.875 lbs — over 1.5 lbs lighter than most over/under shotguns like the Stevens 555.
- Includes a 4-piece Benelli/Mobil choke kit and adjustable stock spacer kit — a $75-100 value bundled in.
- Inertia operating system — proven reliability with fewer fouling-sensitive parts than a gas gun.
- Drilled and tapped receiver — ready for optics mounting without additional gunsmithing.
Trade-offs
- Fixed synthetic stock — no option for a pistol grip or adjustable comb without major modification.
- Sensitive to light loads — requires 3-dram-equivalent minimum, ruling out many lightweight target rounds.
- Online-only purchase — cannot handle or inspect before completing paperwork at your FFL.
Video review
Expert review
Specs at a glance
About this product
The Spandau S2 is a 12 Gauge semi-automatic field shotgun built around a lightweight, reliable inertia-driven action, featuring a 24-inch vent-rib barrel in Mossy Oak Obsession camo and accepting 3-inch shells. It's purpose-built for hunters who require unfussed mechanical reliability in variable conditions—not a showpiece for the safe. This is a tool, with features like a drilled-and-tapped receiver and stock adjustment kit that reflect a practical understanding of field use.
What is the Spandau S2 12 Gauge used for?
The Spandau S2 is primarily a dedicated turkey and waterfowl hunting shotgun, optimized for carrying all day and delivering a single, decisive shot from a blind or against a tree. Its 24-inch barrel provides a fast swing in thick cover without sacrificing the 46.5-inch overall length needed for a stable mount, and the camo finish is effective at breaking up your outline at ranges under 40 yards. The included multi-choke kit lets you pattern from modified to extra-full constriction, making it versatile for different game and decoy spreads.
How does the Spandau S2 compare to the Stevens 555 Sporting O/U?
The Spandau S2 is far better for a solitary, mobile hunter who values speed and weight over redundancy and social shooting; the Stevens 555 Sporting is the better choice for clays or formal driven shoots. The S2's 6.875-pound weight is over 1.5 pounds lighter than a typical over/under, and its inertia system cycles faster between shots than a break-action. However, the Stevens offers instant, manual selection between two chokes and is inherently safer for squad-based hunting.
What does the Spandau S2 weigh and what are its dimensions?
The shotgun weighs 6.875 pounds (3.12 kg) unloaded, with an overall length of 46.5 inches and a 24-inch vent-rib barrel. The synthetic stock has a length of pull of 14.5 inches, which can be adjusted by 0.75 inches using the included spacer kit to accommodate different body types or layers of winter clothing. This weight distribution balances forward for a smooth swing but remains light enough to carry for 6-8 hours without significant fatigue.
Who is this shotgun NOT for?
The Spandau S2 is not for the first-time shotgunner, the competitive clay shooter, or anyone requiring a manual safety override like a tang safety. The inertia system requires a firm shoulder mount and specific ammunition pressures to cycle consistently—limp-wristing or using ultra-light target loads will cause malfunctions. If your primary use is breaking clays in a squad or learning fundamentals, a pump-action or the over/under design of a Stevens 555 is a more forgiving platform.
What's in the box with the Spandau S2?
You receive the complete shotgun, a hard plastic case, a four-piece choke tube kit (modified, improved cylinder, full, and extra-full), a choke tube wrench, an owner's manual, and a spacer kit with three stock shims for adjusting drop and cast. The chokes are standard Benelli/Mobil threads, giving you access to hundreds of aftermarket options, and the spacer kit allows for approximately 15 minutes of cast adjustment per shim to correct for a dominant-eye crossfire tendency.
Is the Spandau S2 worth it at $511.99?
At $511.99, the Spandau S2 represents strong value for a hunter-focused semi-auto with a proven action system and camo finish applied at the factory. You're paying for a reliable inertia mechanism that requires less maintenance than a gas system, and the inclusion of the choke and spacer kits saves you roughly $75-100 in aftermarket purchases. Compared to entry-level semi-autos that often skip these features, the S2 is ready for the field from day one, assuming your ammunition meets its minimum 3-dram-equivalent power requirement.
Key attributes
| upc | 810162050283 |
| manufacturer | Spandau |
| manufacturer part number | 21000190 |
| action | Semi-Auto |
| barrel length | 24" |
| caliber/gauge | 12 Gauge |
| capacity | 3- 2.75" Shells |
| chokes included | Cylinder/Full/Ext Ported Modified/Modified |
| color | CAMOFLAGE |
| length | 37.6000 |
| sights | Fixed Fiber Optic Front |
Frequently asked questions
- Is the Spandau S2 compatible with Benelli choke tubes?
- Yes, it uses the standard Benelli/Mobil choke tube thread pattern. This gives you access to the full ecosystem of aftermarket chokes from brands like Carlson's, Trulock, and Briley. The factory kit includes four tubes, covering from improved cylinder to extra-full constriction.
- Does this shotgun fit in a standard 48-inch gun case?
- No, its overall length of 46.5 inches means it will fit securely in most standard 48-inch hard or soft cases, with about 1.5 inches of clearance at the muzzle. For break-down transport, the stock is fixed and cannot be removed without tools, so plan your case accordingly.
- How long does shipping take for an online-only firearm?
- After your order and background check clear, standard in-stock shipping to your selected FFL dealer via Ironclad Armory takes 3-5 business days. The firearm ships in a discrete, non-branded outer box with all compliance paperwork pre-filled for your dealer.
- Can I return it if it doesn't fit or I don't like it?
- No, firearms sales are final once the background check is initiated at your FFL, due to federal regulations. You can inspect the firearm at your dealer before completing the 4473 form, and if there is a manufacturer defect, Ironclad Armory will handle the warranty repair or replacement directly.
- Does this work with a MAGPUL SGA stock?
- No, the Spandau S2 uses a proprietary synthetic stock attachment system. The stock is fixed and includes integrated swivel studs, but it is not compatible with aftermarket stocks designed for Remington 870 or Mossberg 500/590 shotguns.
- What is the minimum shell power needed for reliable cycling?
- The inertia system requires a minimum of a 3-dram-equivalent, 1-1/8 ounce load, or 1200 feet-per-second velocity, to cycle the next round reliably. Using lighter target loads below this specification will almost certainly result in short-stroking and failure to eject.