Quote Originally Posted by Jon Budd View Post
easy way to get a lot more power and a nicer shooting gun, it to convert the piston to take a diana 28mm parachute type seal.
* remove the piston head and buffer and put them in the parts bin
* shorten the piston nose spigot a mm or two
* thread it M8 or similar
* make an ally adapter (dovetail type) to suit the diana seal, including a shoulder of around 2-3mm (you can't make the stroke too long, or it'll run out of cocking slot)
* screw the ally seal adapter onto your M8 threaded spigot and fit the seal

will make 11+ FP all day long with a very moderate spring, and shoot softer too (better piston cushioning / more swept volume)

Takes less than an hour.
Customseals sell an adapter to take the 28mm seal all that's needed is to have the rod trimmed down drilled and tapped M5 http://www.customairseals.com/produc...-seal-adaptor/