The Umarex Hammer big bore hunting air rifle is an absolute beast. Any air rifle that can push a .50 caliber slug downrange at 760 feet per second is an impressive piece of machinery, but what good does a tool like that do you if you don't have everything you need to shoot it? This 2 shot magazine is designed exclusively for use with the .50 caliber Umarex Hammer. If you need to increase the firepower of your Hammer, this magazine is here to help!