Firearms SCAR-Heavy With X-25 Drum – 50 Rounds Of .308! Emmanuel December 21, 2015 681 Views This SCAR-H features a HANDL Defense lower receiver which will accept the X-25 Drum magazine as well as standard AR-10 magazines. These dudes reach out to about 300 yards, well within the reach of the mighty .308. Fifty rounds of it? Awesome!