The M249 SAW was not the replacement for the M60. The M240G Medium Machine Gun manufactured by Fabrique Nationale replaced the M60 series.
http://www.fas.org/man/dod-101/sys/land/m240g.htm
After extensive operational and technical tests, the US Army has selected and type classified the M240B 7.62mm medium machine gun produced by Fabrique Nationale as a replacement for the M60 Series machine gun. This is a ground mounted variant of the original M240/M240C/M240E1 coaxial/pintle mounted machine gun used on M2/M3 Series Bradley Fighting Vehicles, the M1 Series Abrams tank, and the U.S. Marine Corps LAV-Series of Light Armored Vehicles. While possessing many of the same basic characteristics as the M60 Series medium machine guns, the durability of the M240 system results in superior reliability and maintainability when compared to the M60.
Manufacturer: Fabrique Nationale Manufacturing, Inc.
Length: 47.5 inches (120.65 centimeters)
Weight: 24.2 pounds (10.99 kilograms)
Bore diameter: 7.62mm (.308 inches)
Maximum effective range: 1.1 miles (1.8 kilometers) on tripod mount
Maximum range: 2.31 miles (3.725 kilometers)
Rates of fire:
Cyclic: 650-950 rounds per minute
Rapid: 200 rounds per minute
Sustained: 100 rounds per minute
Unit Replacement Cost: $6,600
