The 9A-91 Sight isn't centered when aiming down it. Could fix by raising model height in some way?

This issue should be fixed in the next update. :)

I've made an attempt at fixing the positions, feel free to re-open this issue if the positions are still not "good enough"

The Kobra Sight have a slightly wrong position when attached on any guns.

Might be a better idea to create a new issue for the Kobra, as this issue only applied to scopes from before the 0.5.0 update.