The ATI Bulldog is a 12 gauge semi-auto bullpup shotgun (American Tactical part no. ATIS ATIG12BDT) built around a modular, AR-inspired layout. An 18.5-inch barrel and 5-round capacity keep the gun short and maneuverable without sacrificing payload, while Picatinny and MLOK rail space around the fixed tan stock lets you mount lights, optics, and other accessories. Quick-acquisition flip-up sights, a three-piece choke tube set, and an AR-style charging handle round out a shotgun built for tactical users and shotgun enthusiasts alike. A Picatinny cutout at the base of the magazine well even lets a spare magazine double as a foregrip.

Key Specifications

• The 18.5-inch barrel keeps pattern performance close to a full-length gun in a much shorter package.
• Capacity is 5 rounds, giving a strong payload before reloading.
• Overall length is just 32.9 inches, thanks to the bullpup layout that moves the action behind the grip.
• Front and rear sights are adjustable and flip up for quick target acquisition.
• A manual safety gives a clear, deliberate on/off control.
• The barrel and receiver wear a black finish that matches the tan furniture for a modern tactical look.
• A three-piece choke tube set is included so you can tune the pattern to the range.
• Picatinny and MLOK rail space around the fixed stock accepts lights, optics, and other accessories.
• An AR-style charging handle keeps manipulation familiar for shooters coming from modern rifles.
• Ships at approximately 10.25 pounds in its case, per the listed shipping weight.

Frequently Asked Questions

What magazine capacity does the Bulldog hold? It holds 5 rounds in the included box magazine.

Can accessories be mounted on it? Yes, Picatinny and MLOK rail space around the stock accepts lights, optics, and other accessories.

Are the sights adjustable? Yes, the front and rear sights flip up and are adjustable for windage and elevation.

Buy the ATI Bulldog 12 Gauge Bullpup Shotgun

The Bulldog packs a full 18.5-inch barrel and 5-round capacity into a genuinely compact bullpup frame from American Tactical / ATI. Picatinny and MLOK rail space, an AR-style charging handle, and quick flip-up sights make it as much at home on a tactical course as in a truck gun role. Compare it with the rest of our semi-auto shotguns and order from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.