Hatsan 135 .25 cal. tuning

Hatsan 135 .25 cal. 6,35mm Scope-Valiant Lynx 6x40 AOIR Mil-Dot -New Lothar Walther barrel piston and barrel seals -completely polished working parts. -Light piston 25m/s less speed but half recoli. I just wanted to try this air rifle with quality barrel. It is much better than the factory one but the target rifle will never be out of it. It’s still magnum piston airgun for hunting and in my case for fun (and long range plinking :) ) Music in video -