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ATI AR-15 Milsport 410G Shotgun 18.5" BBL

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Please list your Preferred FFL Dealer in the appropriate field during checkout. Please read our Firearm & Ammunition Ordering Guidelines and check all federal, state, and local laws and restrictions prior to ordering any firearm. Purchaser must comply with all applicable laws for pickup.

Built with our patented 410 gauge modular upper receiver, the Milsport 410 is the perfect shotgun for small game, large game, home protection and target shooting.  Chambered for 2 1/2" .410ga shells, the Milsport 410 is a must have multi-purpose shotgun.

Featuring an 18.5" barrel with a custom 13" M-LOK, the Milsport 410 runs on a gas operated, short stroke balanced piston system.

Each Milsport 410 comes with one 5 round American Tactical polymer magazine.  Additional 5 round magazines are available for seperate purchase.  The Milsport 410 will only operate with the patent pending American Tactical polymer 410 magazine.

Every Milsport 410 is built on our Milsport lower receiver and can be converted to 5.56 or 300blk just by changing the upper receiver!  Every Milsport 410 upper receiver is built to regular AR spec and can be installed on most mil-spec lower receivers!


    Patented Aluminum Upper Receiver
    Polymer Front And Rear Flip Sights
    1 Cylinder Choke Tube (Other Tubes Available)
    ATI SR-1 Deluxe Buttstock
    Caliber: .410 Gauge
    Capacity: 5RD (15RD Mag Sold Separately)
    Barrel: 18” Dull Hard Chrome
    Forend: 13” Rail
    Fire Control Group: Milspec


The Omni Hybrid 410 shoutgun only works with 2 1/2" shotgun shells.  Some manufacturers 2 1/2" shells are actually longer than 2 1/2" and may not operate in this gun.  Please check the length of your 2 1/2" shells prior to attempting to fire them.   The shells must be properly seated in the magazine to avoid feeding problems.

The Omni Hybrid 410 shotgun only fires 410 ga cartridges.  Do not attempt to fire other calibers of ammunition through this firearm.  Other cartridges such as 45LC or 45-70 will not operate with this firearm and may cause damage to the shotgun and harm to the operator if attempted.