I've had this for a couple weeks now and still can't get it to work. It comes with no instructions at all. The guy at tippmanpros has no clue what he is talking about and keeps selling me the wrong parts. The part that screws onto the expansion chamber to the marker does seem to stay solid on the chamber. Do not attach co2 of it is doing that as it blew the chamber off my gun last night. Very loud and scary.
Don't buy it unless it comes with exact instructions and a parts list of necessary items to get it to work