Got this in a package deal, but I've already got six other classics for loaning out , so lets find this one a new home.
I just replaced some seals and tested it, so it's shooting great at 275 fps. It has a reverse valve and a Benchmark expansion chamber, so it should be able to use CO2 okay (though I'd still recommend HPA or at least a remote line).
SOLD on eBay for $140 shipped
If you don't like the Smart Parts barrel, I have a few others I could offer instead. Boomstick, J&J Ceramic, Lapco....just let me know what you'd like