Cross hair out out of focus

Jumbofinks

Private
Minuteman
Jun 27, 2021
8
1
Australia
Hi guys,

Sorry im new to the game and i've been reading a pile of things trying to get to the bottom of my problem with new albeit used gun, maybe you can help?

The scope that came with it is a Nikko scope (4x32) fixed - as in picture.

The problem i have is that the cross hairs are fuzzy and i would like to bring them into focus. The thread just down from the eyepiece doesn't seem to have an rotation in it, i've tried cleaning it up and putting WD40, its to the point where im starting to wonder if its merely aesthetic or it once turned?
IMG_3927.jpg
Are any of you able to shed light on this particular model?