The American Tactical ATI Bulldog is a 20 gauge semi-automatic bullpup shotgun (ATI part no. ATIG20BDB) that tucks the action behind the trigger group, packing a 16-inch barrel into an overall length of just 32.75 inches. Its modular, modern design borrows an AR-style charging handle along with Picatinny and M-LOK rails, giving tactical shooters familiar controls and plenty of mounting real estate. An adjustable cheek rest and a magazine cutout at the base of the stock let a shooter slide a spare loaded or empty magazine onto the bottom rail and use it as a makeshift fore grip. Built for home defense or truck-gun duty, the Bulldog trades a traditional shotgun profile for a shorter, easier-to-store package.

Key Specifications

• Chambered in 20 gauge with a 3-inch chamber for standard and magnum shells.
• A 16-inch black steel barrel keeps the bullpup profile short and maneuverable.
• Overall length of just 32.75 inches is dramatically shorter than a traditional shotgun of the same barrel length.
• Holds a 5+1 capacity with the included 5-round detachable magazine.
• Adjustable open sights give a fast, precise sight picture without an optic mounted.
• Ships with a three-piece choke tube set for versatility across hunting and defensive loads.
• A manual safety gives simple, positive on/off control.
• Integrated Picatinny and M-LOK rails on the receiver and handguard accept optics, lights, and grips.
• An adjustable cheek rest helps shooters get consistent eye alignment with a mounted optic.
• A quick-release magazine button and bottom rail cutout let a spare magazine double as a fore grip.

Frequently Asked Questions

Is the Bulldog a bullpup design? Yes, the action sits behind the trigger group, letting a 16-inch barrel fit into a 32.75-inch overall length.

What is the magazine capacity? It holds 5+1 rounds with the included 5-round detachable magazine.

Can I mount optics and accessories? Yes, integrated Picatinny and M-LOK rails on the receiver and handguard give multiple mounting points.

Buy the American Tactical ATI Bulldog Bullpup Shotgun

Shooters who want a genuinely compact 20 gauge without giving up barrel length will find the Bulldog’s bullpup layout hard to match. Its rail space and quick-swap magazine trick make it a versatile choice for a nightstand or truck-gun role. Order it from American Tactical / ATI‘s lineup of semi-auto shotguns through our Lubbock, Texas gun shop for fast, insured shipping to your FFL.