Weihrauch HW55

[Mach 1.5]

Just found this on the web with the mention of the alloy piston head.
The thing about the HW55 is that a lot of though went into balancing the powerplant to keep recoil to an absolute minimum. They don't give this kind of attention to any of their other guns.

They had 25mm pistons, but were much thinner, and had a big slot cut from the side opposite the cocking slot to make it as light as possible. The nose of the piston was also aluminum to save a bunch of weight. Less weight moving at the shot, means less recoil and quicker locktime.
But...
A piston that light would have a ton of bounce. So they made the transfer port 4mm to eliminate the bounce which would destroy accuracy. They kept the leather seal so that it wouldn't deform when it smacked the front of the compression tube, and it also offered less friction in the tube.

So with a 4mm TP would the internals from its sister the HW50 get the HW55 up to 10ft lbs.. ?

Mach 1.5