This Scope Protector resolves the biggest problem of getting your sight shot out. If the lens of a magnifying sight or red dot sight is hit head-on by a BB, it is usually damaged, cracks form in the glass, or a hole may appear. With the Scope Protector, this problem is a thing of the past. It fits easily on all Weaver and Picatinny rails and protects your equipment. In addition, it also has a 3mm thick plexiglass for reliable protection. Note that the visor may be shot out, but that would be a cheaper replacement than fixing your expensive sights.