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AR Upgrade Parts

American Tactical Inc (ATI) manufactures aftermarket components for the AR-15 firearm platform. You can find 9mm magwell adapters for AR-style lower receivers chambered in .223 Rem and 5.56x45mm that allow the use of 9mm Glock magazines in your MSR project. ATI after market AR components are ideal for your next workshop project or for upgrading your favorite sporting rifle.