Vortek Weihrauch 'O' Ring Piston Head Conversion

[greenwayjames]

I'm just waiting now for all the ******** to turn up and say that "O rings are old hat and don't work"

Of course they work. One large volume spring air rifle manufacturer used them on piston heads for all of their models for a considerable number of years. Different power outputs over the range of guns. They used big and small transfer ports