You know something DerAdler, I wonder if it's the M60's foregrip that causes the problems, by acting as an insulator?
I thought the M240's M60-alike foregrip was a great idea (comfy!), but now I'm not so sure...
I've noticed that Yank support weapons have always had ergonomic foregrips when compared to other nations, e.g BAR (Foregrip) - Bren, MG42 (No foregrip). M60, M240 (Foregrip) - FN MAG (No foregrip).