I traded a Toro circ ash catcher for this (I know a lot of people will think I am crazy, but I don't care I love this thing!)
It came with a RooR diffused downstem, k-clip, and a stock RooR bowl (the crown label ac I already had). After I got it I went to WS and picked up a pretty sick AK to match it. It rips like a champ: