The RPG is a wicked little weapon and deserves some counter-measure attention AND something similar deserves to be in the hands of our own troops.
What we have is the M72A1 LAW(Light ANtitank Weapon, which is a one-shot weapon weighing over 5 pounds. To carry multiple LAW rounds, you have to carry multiple launcher tubes, which can be a pain.
What's needed is something similar to the RPG or old-style bazooka, where you have a reloadable launcher with separately-carried packs of rockets, like a 3-pack in a resealable light container that can be attached to your ALICE gear. It also needs to be cheap enough that troops can actually get to fire a couple of dozen rounds in training to get comfortable with it.