this is an RPG, i thought of this, since Rocketlauncher is lame because it follows people, and mortar can shoot very rapidly,
an rpg will have to be reloaded everytime you fire, which will require another press of the firing button. Just like shotgun, only an RPG will require that after every shot.
It will do about 39 damage? ( 2 shots won't kill a trial)
and will fall under heavy arms.
Unlike the rocket launcher it will not follow it's target, but will just got straight like normal bullets, it will cause an area of effect damage like an explosion, altough if it zips past you it won't explode, it should also explode when it stops moving forward/at it's maximum range.
it will go faster then a rocket, actually it should go quite fast.
i used this picture for reference:
http://www.bf2benelux.com/page/bf2sf/wapens/rpg.jpg
the green piece is the grenade, so the front end of the RPG