Granted that I play paintball only at the very basic levels, but I just think that a fully automatic paintball gun kinda goes away from the spirit of paintball (at least the way our group plays it).
We like to put more emphasis on stalking, tracking, hiding, and sniping. But like I said, we are just a bunch of idiots having fun with paintballs
That being said, I think the MG42 did look way way way cool
