Don't woory, it IS in the game. Variously termed Carl Gustav, CG, MAW (Great Britain), or weird-looking numerical designations in nordic countries. Often with M1, M2 or M3 model number.
And basically it is just what it is suppsed to be: a shoulder-fired 84mm RLR, with HEAT or HE warheads.
Penetration is between 40 and 50 in the game, so relate that to the tank armors of that time.
One team carries generally up to 12 shots, so that makes you a team weapon quite comparable to a RPG-7.
You can find it in several countries indeed, among which USA , UK, Germany (W), Netherlands, Portugal, Canada, Sweden, Norway, Denmark...
Oh, and your RBS69 seems to be a SAM missile. Hence the pen=2
