Hello, someone?

Hello, how i do this.. if u zoom in with a sniper u can shot good.. but how i change ex.
L96A1 Scope to a - SR25 Scope.. then im ready i changed eveything then im releasing it.
If u help u get credit's

i did not understand that one bit....
and if you were trying to ask how to change exp...its impossible.

ex. = example

he says he like wants to change the l9 scope to the sr25 scope