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Ati

AMERICAN TACTICAL IMPORTS MIL-SPORT GEN 2

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Patented .410

Gauge modular upper receiver design

Chambered 2

1/2" .410 Gauge shells

18.5" Barrel

Custom 13" M-LOK handguard

Gas-operated, Short-stroke

Balanced piston system

Includes One

5-round American Tactical polymer magazine

$479.99
List Price: $569.95
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SKU: 228231

Overview

Designed for hunters and shooters who want a versatile .410 platform, this shotgun is set up for small game, large game, home protection, and target shooting. It uses ATI’s patented modular upper receiver and is chambered for 2 1/2" .410 Gauge shells, with an 18.5" barrel and 13" M-LOK handguard. The gas-operated, short-stroke balanced piston system and included 5-round polymer magazine support its intended use, while the note that it operates only with ATI’s patent-pending polymer .410 magazine is an important limitation to keep in mind. Built on ATI’s Milsport lower receiver, it also offers conversion flexibility through upper-receiver changes.

Why Hunters Choose the Ati

Patented .410

Gauge modular upper receiver adds

Chambered 2

1/2" .410 Gauge shells

18.5" Barrel

Custom 13" M-LOK handguard

Gas-operated, Short-stroke

Balanced piston system

Includes One

5-round American Tactical polymer magazine

Key Features

  • Patented .410 Gauge modular upper receiver design
  • Chambered for 2 1/2" .410 Gauge shells
  • 18.5" barrel with custom 13" M-LOK handguard
  • Gas-operated, short-stroke balanced piston system
  • Includes one 5-round American Tactical polymer magazine
  • Built on ATI's Milsport lower receiver and convertible by changing the upper receiver

Best Used For

  • Hunters wanting a .410 shotgun for small game, large game, and target shooting
  • Users needing a compact 18.5-inch barrel setup for home protection
  • Shooters who want a modular platform with an M-LOK handguard
  • Owners seeking a shotgun that uses the included 5-round polymer magazine
  • AR-platform users interested in a .410 upper compatible with mil-spec lowers

Specifications

Barrel Length18.5"
Conversion CompatibilityCan be converted to 5.56 or 300blk by changing the upper receiver
Gauge.410 Gauge
Lower ReceiverATI's Milsport lower receiver
M Lok Length13"
Magazine Capacity5 rounds
Magazine TypeAmerican Tactical polymer magazine
Operating SystemGas operated, short stroke balanced piston system
Patented Modular Upper ReceiverATI's patented .410 Gauge modular upper receiver
Shell Length2 1/2"
Upper Receiver CompatibilityRegular AR spec; can be installed on most mil-spec lower receivers

Pros

  • Patented .410 Gauge modular upper receiver adds platform flexibility.
  • Chambered for 2 1/2" .410 Gauge shells.
  • 18.5" barrel with custom 13" M-LOK handguard.
  • Gas-operated, short-stroke balanced piston system.
  • Includes one 5-round American Tactical polymer magazine.
  • Built on ATI's Milsport lower receiver with upper-receiver conversion options.

Considerations & Trade-offs

  • Chambered for 2 1/2" .410 Gauge shells, so it is limited to that ammunition length rather than broader .410 loads.
  • The shotgun is designed to operate only with the patent pending American Tactical polymer .410 magazine, which narrows magazine options.
  • Its 5-round magazine capacity may be a practical limitation for users who want more rounds on board before reloading.
  • The modular setup adds flexibility, but it also means the platform is built around ATI-specific components and compatibility requirements.

Suggested Comparisons

  • .410 gauge shotguns
  • AR-style shotguns
  • multi-purpose hunting shotguns
  • home defense shotguns

Suggested Accessories

  • Shotgun magazine
  • M-LOK rail accessories
  • Shooting sling
  • Cleaning kit

Frequently Asked Questions

What shell length does the Milsport 410 use?

It is chambered for 2 1/2" .410 Gauge shells.

What magazine is included with the shotgun?

Each Milsport 410 comes with one 5-round American Tactical polymer magazine.

Will it run with standard .410 magazines?

The product data says it will only operate with the patent pending American Tactical polymer .410 magazine.

What barrel and handguard setup does it have?

It features an 18.5" barrel with a custom 13" M-LOK handguard.

Can the Milsport 410 be converted to other calibers?

Yes. The long description says it is built on ATI's Milsport lower receiver and can be converted to 5.56 or 300blk by changing the upper receiver.