Rick, I have one of them. They work pertty good unless you got a real thick patch with the ball. When I got mine it came with an in-line adaptor, not sure if they still do. They use the 12 gram cly's. I have a 5 pack I carry in my box made by "copperhead" which states on the box fits all "crosman" and most gas guns. Was just looking at the CO2 holder yesterday and seems they run $19.95 from Cabelas. I get my CO2 clys, at K-mart.
Gun Runner