Definatley M60 with Red Dot/ACOG. The M60 is powerful, and the best LMG. I know from experience with all of the LMGS.
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85% of the people who play COD4 use martyrdom. If you're one of the 15% of people that doesn't need to die to get a kill, put this in your sig.
PSN ID: Eagles2409
XBOX 360 Gamertag- AlexH023