Hear the pssshhhhh noise coming from the barrel? It's most likely a cup seal leak. The RS/VS markers have a distinctive new cup seal. The older style Spyder cup seals will not work in the RS/VS markers. 9 times out of 10, replacing the cup seal will rid your marker of that nasty pressure leak. Be sure to get some extras just in case.
This is a replacement for Kingman part #ITP001 in your manual.
