Hello,
I recently picked up a 1987 HW80 project gun. Chronoed it yesterday and it was a bit uncomfortable
So tonight I have had her apart to tame her errant ways and have found it has a zephyr piston seal and a very well finished square section spring with v.little preload. So was the Zephyr seal available to us mere mortals? I am guessing so as the spring guide is still a standard Weihrauch one.
Cheers all.