K2 have been talking to WGP for a long time, as well as Tipmann and WDP.
It's part of a strategy that will give them (Brass Eagle) a foothold in all levels of the game because up until the acquisition of WGP (if indeed it has been made official) they didn't have a high end marker.
As for any possible entanglement of attorneys across patent lines, it seems logical to me that if SP wakes a tiger like K2, they would have a serious fight on their hands, if they don't wake it then I doubt K2 would activate any of their legal department....'let sleeping dogs lie' would seem the expedient course to take for both parties