The ATI Alpha Maxx is a semi-automatic .410 gauge shotgun with an 8.75-inch rifled barrel. It ships with a 9-inch M-LOK handguard, flip-up front and rear sights, a forward assist, and a charging handle. Black synthetic stock, 5-round capacity. 
 

Key Specifications 

• Model: Alpha Maxx 
• Caliber: .410 GA 
• Barrel Length: 8.75 inches 
• Capacity: 5 Rounds 
• Condition: New in Box 
• Finish Color: Black 
• Trigger Type: Standard 
• Grip Type: Standard 
• Stock Material: Synthetic 
• Sights: Flip Up Front & Rear 
   

Detailed Features 

The 8.75-inch rifled barrel keeps the overall package short and easy to move in tight spaces. The 9-inch M-LOK handguard has slots along its length for lights, grips, or other accessories. Flip-up sights fold flat when not needed and deploy quickly. The forward assist and charging handle help clear the action if a round doesn't fully chamber.

Feedback on the ATI Alpha Maxx .410 semi-auto tends to split between appreciation for its compact form and concern about reliability.

The short, lightweight build gets consistent praise — it handles easily, recoil is mild compared to larger gauges, and the M-LOK handguard opens up accessory options. Home defense and range use come up most often as intended applications.

Reliability is the main sticking point. Several users report jams or misfires, especially with certain ammunition types. For a defensive firearm that's a real concern, and the feedback makes clear that ammunition selection matters with this platform.

.410 ammo availability and cost draw occasional complaints — it's less common and more expensive than 12 or 20 gauge, which affects how much range time owners actually log.

Opinions on value vary. Some see it as a solid entry-level option at the price; others think the reliability issues push them toward alternatives. Whether it works for you may come down to how much you test it with your preferred ammunition before relying on it.