When I'm in the mood for some pure infantry goodness, I like to play Operation Metro. There are a variety of servers that offer some flavor of no explosives. One server I play on does not allow RPGs or grenades, but does allow frag rounds, claymores, and C4.
My question is: Does anyone have good ways to combat frag rounds without resorting to frag rounds? Take, for example, the left stairs at B (playing as RU). As soon as I go down the stairs, I'm usually hit multiple times by frag rounds. If I try to inch my way down, the blast effect gets me before I even see my enemy. Likewise, playing as US in this situation is no better, as frag rounds are hitting the back and side walls so even getting up into lockers is difficult.
Does anyone have any thoughts on how to handle opponents like this, outside of getting a coordinated group to smoke/push (a response that is basically applicable to any situation)?