From CNN.com:
M240G medium machine gun
Primary function: 7.62 mm general-purpose machine gun
Weight: 24.2 pounds (10.99 kilograms)
Maximum effective range: 1.1 miles (1.8 kilometers) with tripod mount
Rate of fire: cyclic, 650-950 rounds per minute; rapid, 200 rounds per minute; sustained, 100 rounds per minute
Other features: Designed to be mounted on tanks and light armored vehicles, but modified for use by ground forces. U.S. Marine Corps is replacing M60E3 with M240G
Source: U.S. Marine Corps