The American Tactical ATI Alpha Maxx 410 Upper Pistol Kit Gen 3 converts a standard mil-spec AR-15 lower into a compact .410 gauge platform for smooth, controlled shooting. This complete upper assembly pairs a rifled 10" barrel with a 1:20 twist and a 9" Poly MLOK handguard, giving shooters a stable, accessory-ready setup with integrated flip-up front and rear sights.
Designed as a dedicated .410 bore upper, the Alpha Maxx 410 kit includes a 5-round magazine, buffer, and cylinder-style choke to fine-tune performance with different loads. The adjustable gas system with an easy-to-use knob lets you dial in reliability across a range of ammunition, making this upper well suited for range use, training, and small-game hunting. Built by American Tactical, it reflects a focus on practical innovation and dependable performance for the modern AR-15 shooter.
- Manufacturer: American Tactical
- Model: Alpha Maxx 410 Upper Pistol Kit Gen 3
- Caliber: .410 Gauge
- Barrel Length: 10"
- Twist Rate: 1:20
- Handguard: 9" Poly MLOK
- Capacity: 5 Rounds
| __Firearm Type | Rifle, Tactical Pistol |
| __Material | Polymer, Aluminum |
| __Caliber | .410 Bore |
| __Model | Alpha Maxx 410 Upper Pistol Kit Gen 3 |
| __Capacity | 5 |
| __Barrel Length | NA |
| __Optic Footprint | NA |
| __Action | NA |
