At just under 2-minutes, a skilled soldier can convert the XM-307 auto cannon into the XM-312 machine gun. Continue reading to see more. Click here for first picture in gallery.


Developed by General Dynamics, the XM-307 fires 25mm ammunition with almost no recoil. Because of this, unmanned vehicles and aircraft are commonly equipped with the XM-307. In just under 2-minutes, it can be transformed into the XM-312 machine gun capable of shooting 260-rounds per minute — .50-caliber.