The ATI .410 AR Upper Kit 18" Brl 5rd Mag Popup Sights 3oz Buffer turns a standard AR-15 lower into a smooth-shooting .410 shotgun-style platform. Built around the Omni upper with an 18.5" stainless steel barrel and 13" M-LOK handguard, this complete kit includes a dedicated .410 bolt carrier group, 5-round magazine, flip-up sights, and a tuned 3 oz buffer for reliable cycling with 2.5" .410 shells.

This upper is well suited for range use, small game or pest control, and general training where light recoil and affordable practice are priorities. The adjustable gas system and modified choke help you fine-tune performance with different loads, while the optic-ready top rail lets you add your preferred red dot or scope. It reflects ATI’s focus on practical innovation in AR-pattern shotguns and caliber conversion kits.

• Manufacturer: ATI
• Model: Omni Upper Kit .410
• Caliber: .410 Gauge
• Action: Semi-Automatic (when installed on compatible lower)
• Barrel Length: 18.5"
• Number of Magazines: 1
• Capacity: 5