http://www.gdatp.com/products/lethality/mk47/mk47.htm This weapon is presently deployed with special operations units in Afghanistan and Iraq. The Striker weighs in at 90 pounds vs 150 pounds for the MK19 [with iron sights]. It operates much like the M2 .50 cal MG. It fires from a closed bolt which improves accuracy. It has day/night integrated fire control [AN/PWG-1 day/video sight]. It has a laser range finder and a ballistic computer. Another advantage is that there is almost zero chance of a cookoff. rate of fire 225 - 300 rounds per minute.