Product Review: Ultramag .50 BMG Upper Kit for AR-15, by Michael Z. Williamson
I recently tested the Ultramag .50, manufactured by Safety Harbor Firearms (SHF) of Florida.The Ultramag .50 is a bolt action, side-fed magazine, .50 BMG upper that uses the AR-15 lower and trigger group. The two big advantages to this setup are that [in the US,] the Ultramag .50 [barreled upper receiver] requires no paperwork to purchase, and is not on record as a large caliber weapon, since it is bought strictly as “replacement parts.” As far as anyone is concerned, you own an AR-15, which can be more discreet if either purchased privately, or by using a forging such as …