I have the KSC predecessor, and I have to say that this is the most satisfying non-rifle GBB out there. The noise, the satisfying thunk of the bolt, and the performance are all fantastic. I can't speak for the KWA, but the real trades on the KSC are awesome. Like all GBBs, stock up on your rubber parts though, I had a hell of a time sourcing a new nozzle (too much storage, not enough shooting made it dry out and crack :P). And yes the KSC can take propane. Personally, I'd like to see someone scan the parts manual of the KWA to see if they match up 100%, that way I'd have easy to source innards and full trades
