Description

The Spandau S2 20 Gauge Semi-Auto Shotgun, 28in is a full-size field gun that brings reliable inertia operation to a lightweight, easy-handling package. Designed for upland hunting, clay targets, and general outdoor shooting, it cycles consistently with loads from target light to heavy magnums. The 28-inch vent-rib barrel and Benelli/Mobil-style choke system let you tune patterns for any game or sport. Per manufacturer specs, the receiver is drilled and tapped for optics, and the included stock drop/cast spacer kit lets you adjust fit for smaller or younger shooters.

Manufacturer	Spandau
Model	S2
Material	Steel receiver, synthetic stock
Compatibility	Benelli/Mobil-style choke tubes; 2 3/4 and 3-inch 20 gauge shells
Finish	Matte black
Weight	Approx. 6.2 lbs (per manufacturer specs)
Condition	New

Key Features

Inertia Operating System – Why it matters: No gas ports to clean or foul, so the action stays reliable season after season, even with light target loads that tend to short-stroke gas guns.
28-inch Vent Rib Barrel – Why it matters: That extra sight plane helps new shooters keep their head down and follow through, making it easier to hit moving clays or flushing birds.
Benelli/Mobil Choke Compatibility – Why it matters: You can swap chokes instantly to tighten patterns for turkeys or open them for close-cover pheasants, without buying a whole new barrel.
Drilled and Tapped Receiver – Why it matters: Mount a red dot or low-power scope for slug hunting or for shooters who need a little extra help seeing the target clearly.
Stock Drop/Cast Spacer Kit Included – Why it matters: Adjust the stock to fit different face shapes and arm lengths — perfect for passing the shotgun down as kids grow.

Who It’s For

This shotgun is built for families who hunt together, for youth shooters stepping up from a .410, and for anyone wanting a light-recoiling 20 gauge they can carry all day. If you’re a beginner looking for a semi-auto that won’t beat you up and lets you focus on form, the S2 fits the bill. It’s also a solid choice for the budget-minded shooter who still wants a gun that patterns well and runs without fuss.

Pros and Cons

Pro: Inertia action digests a wide range of loads — from 7/8 oz target shells to 3-inch magnums — without adjustment.
Pro: Light enough at 6.2 lbs for smaller-framed shooters to swing comfortably.
Pro: Spacer kit means you can custom-fit the stock without a gunsmith.
Con: The synthetic stock has a basic, no-frills finish — not as refined as wood-stocked models from higher-end brands.
Con: The inertia system can be sensitive to limp-wristing; proper shoulder mount is key for reliable cycling.

Comparison

Feature	Spandau S2 20 Gauge	Stoeger M3020	Mossberg SA-20
Action	Inertia semi-auto	Inertia semi-auto	Gas-operated semi-auto
Weight	6.2 lbs	5.9 lbs	6.5 lbs
Choke System	Benelli/Mobil (5 chokes incl.)	Mobil (3 chokes incl.)	Accu-Set (3 chokes incl.)
Stock Adjustability	Drop/cast spacer kit included	Fixed comb, shim kit extra	Fixed comb, no spacers
Price	$574.17	~$529	~$499
Best For	Families, youth, field use	Ultralight carry, waterfowl	Low-recoil beginners, clays

FAQ

What shell lengths does the Spandau S2 20 Gauge Semi-Auto Shotgun, 28in accept?

It accepts both 2 3/4-inch and 3-inch 20 gauge shells. The inertia system cycles reliably with target loads as light as 7/8 oz, as well as heavy magnum hunting loads.

Can I mount a red dot or scope on this shotgun?

Yes. The receiver is drilled and tapped to accept standard optics mounts or rails. Many shooters use a low-profile red dot for slug hunting or clay games.

Are extra choke tubes included?

Yes. The shotgun ships with a full choke tube kit (usually Cylinder, Improved Cylinder, Modified, Improved Modified, and Full), plus a choke wrench and owner’s manual.

Is this shotgun suitable for youth or smaller shooters?

Absolutely. The 20 gauge has mild recoil, and the included stock drop/cast spacer kit lets you adjust length of pull and comb height for a proper fit. At 6.2 lbs, it’s easy to carry and swing.

How does the inertia system differ from a gas system?

An inertia system uses recoil energy to cycle the action, with fewer moving parts and no gas ports to clean. It’s more reliable in dirty conditions but requires a solid shoulder mount. Gas systems soak up more recoil but need more maintenance.

✔️ Nationwide delivery (all 50 states)
✔️ Ships 1-2 business days
✔️ 30-day returns
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Browse more Semi Auto Shotguns or check out our 20 Gauge Shotguns and Youth Shotguns.

Last updated: April 2026