I have only shot the M240G machine gun and it was bad ass. Still' I'm gonna go with the M60 because it just beams machoism.
I mean when I think machine gun I think M60 whether it be the E1, E3, or E4. Sure as a support weapon it's not in the same class as the 240 and some others, but it's sexier for sure. All the 1980's movies had a impact on me. I know it's not best as a GPMG, but if I could own one it be the M60.