ATI BULLDOG – .410 BORE SEMI-AUTOMATIC SHOTGUN The ATI Bulldog is a gas-operated, semi-automatic shotgun chambered in .410 bore, designed to deliver compact firepower in a modern bullpup configuration. Built for defensive and recreational applications, the Bulldog combines magazine-fed reliability with tactical ergonomics in a lightweight, accessory-ready platform. Engineered with a short overall length and a full-length top rail, the Bulldog supports red dots or scopes, while the M-LOK-compatible handguard allows for attachment of lights or vertical grips. The shotgun accepts detachable box magazines and features a fixed synthetic stock with an adjustable cheek riser for enhanced sight alignment. Constructed with a lightweight aluminum receiver and polymer furniture, the Bulldog provides effective handling in close-quarters environments. The semi-automatic action is tuned for high-brass .410 loads and includes choke tube compatibility for varied pattern control. Whether set up for home defense or range use, the Bulldog offers a modern take on the .410 platform. Specifications Model: ATI Bulldog Caliber: .410 Bore (2¾" and 3" shells) Action: Semi-automatic, gas-operated Barrel Length: 18.5 inches Overall Length: Approx. 32 inches Height: Approx. 8 inches (without optics) Width: Approx. 2.5 inches Capacity: 5+1 rounds (standard) Trigger: Standard bullpup trigger linkage Weight: Approx. 8.5 lbs (unloaded) The ATI Bulldog in .410 bore delivers magazine-fed functionality, compact handling, and tactical features in a semi-automatic bullpup platform. Purpose-built for maneuverability and modern accessory compatibility, it brings .410 performance into a versatile, shooter-friendly design.