Sniper scope

[DMZ 0]

What the hell can it be used on? Crafting menu helps me exactly 0 in this regard.

[tnkydoe 17]

Kar98 iron sight can be changed to Kar98 scoped, the mosin may be able to possibly be changed as well

[Mikachu 26]

Kar98 and Mosin.

Also next patch it is renamed to a hunting scope to make that more obvious

[Burgz 6]

I'm pretty sure you can remove it afterwards too? If you wanted to do so:P

[Misty 66]

I'm pretty sure you can remove it afterwards too? If you wanted to do so:P

Yes you can remove/attach as much as you like.