The ATI Bulldog 12 gauge bullpup shotgun is a semi-automatic scattergun from American Tactical that tucks an 18.5-inch barrel into a compact bullpup layout (brand part no. ATIG12BDT). The bullpup layout keeps the shotgun short and easy to move through tight spaces without giving up barrel length. It chambers 3-inch shells and feeds from a detachable five-round magazine. Picatinny and M-LOK rails give you places to mount a light, optic or grip, and the adjustable cheek rest helps you line up the sights or an optic. It is a good fit for home-defense setups, range work and tactical-style shotgun courses.

Key Specifications

• The gauge is 12 gauge, which opens up the widest range of buckshot, slug and birdshot loads.
• The action is semi-automatic, cycling the next shell without manual pumping.
• The barrel measures 18.5 inches, and the bullpup layout keeps the whole shotgun compact around it.
• The chamber is 3 inches, so it accepts 12 gauge shells up to 3 inches long.
• Capacity is 5+1 from a detachable five-round magazine, with one round more in the chamber.
• The sights are adjustable open sights that flip up for quick target alignment.
• Accessory mounting comes from Picatinny and M-LOK rails, so lights, optics and grips attach without adapters.
• The stock is a fixed synthetic design with an adjustable cheek rest, which lets you set comb height to your sight picture.
• The shotgun uses interchangeable choke tubes, so you can tune the pattern to the load and the distance.
• The controls include a manual safety, and the finish is black and tan.

Frequently Asked Questions

Is the Bulldog a bullpup shotgun? Yes. It is a bullpup design, which puts the action behind the pistol grip and keeps the overall length short for an 18.5-inch barrel.

How many rounds does it hold? It holds five shells in the detachable magazine plus one in the chamber, for a 5+1 capacity.

What shell length does it chamber? The chamber is 3 inches, so it accepts 12 gauge shells up to 3 inches long.

Buy the ATI Bulldog 12 Gauge Bullpup Shotgun, 18.5-Inch, 5-Round

Short overall length, rail space and a detachable magazine set the Bulldog apart from a conventional pump or semi-auto. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more semi-auto shotguns in the same category.