@Germanunkol

Yeah, that was pretty clearly discribed. Actually that fits what I had currently in mind. I think it is quite simple with targeting the other entity, but I don't use a targeting system. So I always thought of how to manage that the bullets/rockets/beams always appear at the weapon. So you gave me the final clue for that. Actually that's a server-based system, which I prefer since handling is not so complicated, combined with localized animation handling.

So I'd have those two versions:
1. Machine gun bullets and rockets as fast unguided entities starting from different positions everywhere, heading to a single point and closing up to the real position.
2. Laser beams from client weapon position to server defined impact position, calculated by client defined target position.

Thanks a lot, that sounds like a fine plan and is not to far away from what I'm doing right now.