The PKS-07 scope is described as:
A well-made Russian sniper scope
It’s located at the north-east edge of San Mateo province, in a roadside checkpoint. The accessory case is on a shelf inside one of the checkpoint buildings.
This is super easy as there are only four sicarios at the checkpoint who are easy to take down, then you just walk over and finish the job.
This is an adequate sniper scope with orange chevron vertical markers to provide some visual interest. It has a fixed 4.5x zoom and looks pretty good on a gun.