Walther LP3 seized piston

[Walnut92]

Acquired an otherwise good condition LP3.

The piston is stuck at the top of travel. No obvious corrosion anywhere.

Can anyone advise on how best to remove?

I see two screws holding the cylinder in place but does removing these free the cylinder or does the valve assembly need removal too?

Thanks.

[Walnut92]

To answer my own question:

Soaked in Bilt Hamber Ferrosol for a couple of hours, then a gentle but firm pull brought it out. Piston and seal appear unmarked.

Now the work begins...

[Neil54]

I had to look up Bilt Hamber Ferrosol.
Upgrade of WD40 from what I have read.

Well done on retrieving your piston intact.