Badger Ordnance's USMC SASR 30mm Scope Rings are the same rings issues by the U.S. Marine Corps for the M82A2 Special Applications Scoped Rifle, the military version of the .50 BMG Barrett. USMC SASR 30mm Scope Rings are machined in pairs and serialized to provide the best alignment for your scope. Badger Ordnance USMC SASR 30mm Scope Rings are engineered to ensure the scope stays securely in the rings and the rings stay solidly on the rifle, even under the punishing recoil of the .50 BMG cartridge. Ordnance grade steel Black oxide finish Includes inserts so scopes with 1" tubes can be mounted using these rings NSN #1005-01-521-0930 Badger O Mfg: Badger Ordnance