2 1/2 coils longer than the stock spring will not generally cause a spring not to fit.I have installed 4 pg4 kits in Weihrauch guns and each were a direct drop in and super! I just got 2 pg4 kits for a Tx200HC for my son and me and they will not work. The springs are 2 1/2 coils longer than the factory ones. I read people get them and they work fine and I read some get them and have to cut them? Why is there a difference I know the guns are the same. My gun is new and my sons is at least 4-5 years old and they work on neither.
Maybe you've left the stock top hat in the piston? Sometimes they don't just drop out when you remove the spring and have to be coaxed out.
Call Vortek....Tom will help you figure it out.
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