Smith & Wesson M&P 12
The Smith & Wesson M&P 12 brings S&W’s M&P brand into the bullpup shotgun space — a pump-action 12 gauge with dual tube magazines that feed 14 rounds total (7 per tube) in an overall length of just 27.5” with a 19” barrel. The dual-tube system means the shooter can index between tubes without reloading, similar in concept to the IWI TS12’s rotary system but using a simpler manual pump action.
Read our full Smith & Wesson M&P 12 Buying Guide ↓
Dual Tube Magazines: 14 Rounds Without a Box Magazine
The M&P 12’s most distinctive feature is its dual side-by-side tube magazines, each holding 7 rounds of 2¾” shells (or 6 rounds of 3” shells). A selector switch lets the shooter choose which tube feeds, and when one runs dry, switching to the other is a thumb motion rather than a magazine swap or tube reload. This gives the M&P 12 a functional 14-round capacity without the complexity or cost of a detachable magazine system.
Bullpup Compactness with a Major Brand Behind It
At 27.5” overall with a 19” barrel, the M&P 12 is one of the most compact bullpup shotguns available while still keeping a barrel length above the NFA minimum. What sets it apart from Turkish-made budget bullpups is the S&W name and warranty — this is a major American manufacturer’s entry into the bullpup shotgun category, not an import from an unfamiliar brand. For buyers who want a bullpup shotgun backed by a company they already trust from the M&P pistol and rifle lines, the M&P 12 fills that role directly.
M&P 12 Specs and Features
The M&P 12 ships with a 19” barrel, a 3” chamber, interchangeable choke tubes, a full-length Picatinny top rail, M-Lok slots on the forend, and an adjustable cheek riser. It accepts both 2¾” and 3” shells. The pump action is built around S&W’s own design rather than licensing an existing bullpup platform.
M&P 12 vs. IWI Tavor TS12 vs. Kel-Tec KSG: Comparing Bullpup Shotguns
The M&P 12 sits between the Kel-Tec KSG (also a dual-tube pump bullpup) and the IWI Tavor TS12 (a semi-auto with 15-round rotary tubes) in both price and complexity. The M&P 12’s advantage over the KSG is the S&W brand backing and slightly different ergonomics; its advantage over the TS12 is a lower price point and the simplicity of pump-action operation. All three deliver the core bullpup benefit — a full-length barrel in a dramatically shorter package.
Frequently Asked Questions: Smith & Wesson M&P 12
How many rounds does the M&P 12 hold?
The M&P 12 holds 14 rounds of 2¾” shells (7 per tube) or 12 rounds of 3” shells (6 per tube).
Is the M&P 12 a pump-action or semi-auto?
The M&P 12 is a pump-action bullpup shotgun.
What is the overall length of the M&P 12?
27.5” overall with a 19” barrel.
Does the M&P 12 accept choke tubes?
Yes. It uses interchangeable choke tubes.
See Also: Smith & Wesson • Bullpup Shotguns • Kel-Tec KSG • Pump Shotguns