A scope with range-finding capabilities, could be similar to how the variable scope is in practice. You point at the target, and press the left thumbstick to set the range, the scope could display the distance, and/or give you a dot to show where the bullet would land, however do not make it to make the recon class easier, make it a reward for playing the class for so long. It could be a new perk maybe? Or a scope that costs more kills to jnlock thsn any other attachments