Hey so i would recommend putting a optic mount plate on your sar 9. You also have the rail under the barrel that you could attach a tactical flashlight or even a laser flashlight combo.

Pascual, this is not optics ready. So the only way to add a red dot is to buy a dovetail red dot mount, it's a mounting plate that replaces your rear sight. This appears to have Novak cut sights, so any (Novak dovetail red dot mount) would work. As for other accessories like lasers or flashlight's it has a rail to attach those type of accessories. Hope this helps