 It is capable of being converted quickly into an XM307 with a small number of parts and a few minutes of work at the unit level (and vice versa from the XM307).The Fiscal Year 2008 Appropriations bill awarded $10 million to General Dynamics for the XM307 and XM312.In May 2008 the U.S. Army had awarded General Dynamics Armament and Technical Products (GDATP) a $9 million contract to develop a lightweight .50-caliber machine gun called the XM806 to supplement the Browning M2.