I have the opportunity to buy a FAS609. It is in good cosmetic condition but on having a go with it last night it was tearing the target. On chrono it was giving 289 feet per second which I know is way too low.

There is no manual so does anyone know how to adjust the velocity. I have read something about shims but not sure.

Also what is it worth. It comes with two cylinders.. I haven't seen another one for sale to compare it with.

Any info would be appreciated.

Cheers

Mark