19mm-100mm = QB36-2, TF99, medium power Gamos, etc.--This is from an earlier post, Bob. ( "Gas piston conversions and Chinese rifles") Since the Crosman's are Gamo copies I would think you're on the right track. You may want to PM "Scotchmo".Scotty
I'm interested in this as well.... I was wondering about using a 100mm stroke NForcer gas spring and was curious if the stroke in the Phantom has to be reduced to work with it.... Anyone?....Bob