red dot on springer

I own a Diana p-five springer pistol, I tried a couple of times sighting the pistol but it seems shooting high even at the maximum of the sight movement...
I have one of those Chinese red dots, people say to not use those dots on springers, is it true also for these low power pistols or I can try using it safely?

It's all cheap stuff, but I prefer avoid breaking that anyway...
 
I own a Diana p-five springer pistol, I tried a couple of times sighting the pistol but it seems shooting high even at the maximum of the sight movement...
I have one of those Chinese red dots, people say to not use those dots on springers, is it true also for these low power pistols or I can try using it safely?

It's all cheap stuff, but I prefer avoid breaking that anyway...
I have two $60 feyachi v90 red dots on big bore pcp's and they hold zero. I haven't had to touch them since I mounted them.
 
Vortex on the HW45. It holds better than I can.
IMG_7588.jpeg