As long as there isn't wall spamming like at the TV station in CoD4 MW 1 then it sounds good to me. I always hated that about that level.
I think there should be a minor cool down for the light machine guns myself. Constant firing an M-60 like they do in the game would damage the barrel. That or they could add a perk to change out the barrel. Of course realistically, most 60 gunners have a secondary gunner that goes with them carrying the extra barrel and some of the ammo along with their M-16 A2 (last I knew of).
I'll quit rambling. Sorry about that.