Nice! They sure are fun and easy to build. I'm currently building ANOTHER one lol.
Mine will be in a crosman 140 stock, with Mrod trigger, and some form of PCP power plant. Dunno if it'll be a drop block and paintball tank, or I may end up getting one of these set ups.
Specification: Suit CROSMAN 2240 2250 2260 1377 1322 2300. We can provide other CO2 or PUMP to PCP solution. Do not exceed the range of the pressure gauge. (Due to regulated pressure, spring size and length of cylinder).
www.ebay.com
They also have them in non regulated versions for a little bit less.
Specification: Suit CROSMAN 2240 2250 1377 1322. We can provide other CO2 or PUMP to PCP solution. To install them, you only need to keep the original barrel, grip & trigger set, and Push Pin.
www.ebay.com