Attaching scopes should require a tool as well as "sighting in".

[rybec 339]

To clarify I was referring to "boresighting" a long range scope to a rifle. This ensures your hitting what your crosshairs are aiming at. This can be done at any close distance once you initially attach the scope. I think some are confusing that with the incremental range settings or range "zeroing". Zeroing the scope up and down using page up/down works fine and shouldn't need any additional tools since the scope has already been boresighted. I just think that if you want to be effective at long range than simply attaching any long range scope to a rifle should require this extra step. My opinion of course. Some if not most wont agree, thats fine by me. Perhaps it does skirt that fun to realism line a bit. Someone mentioned the scopes condition as a modifier. Yeah that's actually a good idea. Found a worn out scope? Gonna have to sight it in to make it work.  

For sure. It's a silly concept to me that you can find an LRS, trow it on your mosin, then plink something at 500m.

[stielhandgranate 480]

How about something like this. You attach your long range scope on your rifle. Its off sight. You can kentucky windage it or scroll wheel it and "Zero in scope" option appears. If you select this option when outdoors your character shoots at an object in the distance, after RNG takes no more than one magazine's worth of ammo, you get the message in the feed "I have zeroed in my weapon".

[gibonez 3633]

How about something like this. You attach your long range scope on your rifle. Its off sight. You can kentucky windage it or scroll wheel it and "Zero in scope" option appears. If you select this option when outdoors your character shoots at an object in the distance, after RNG takes no more than one magazine's worth of ammo, you get the message in the feed "I have zeroed in my weapon".

Why not right click the scope in your inventory and then select zero.

Then you press the arrow keys to move internal adjustments until you get the bullet to dead on the middle at your desired zero range. Then right click the scope in the inventory add click finish zeroing. Once this is done you are good to go then you simply press the arrow keys to adjust for range like always.

A mini game within the main game.

Then the condition of the scope determines how long it holds zero. Pristine indefinitely heavily damaged a dozen shots ruined scope is unusable.