Schweitzer Optics is committed to design optical devices as simple and reliable as nature itself. We make space technologies serve you. Bi-focal aiming is a revolutionary new way to hit the target: no more anxiety and no sweat. Bi-focal sights Schweitzer Optics tune precision shooting to be as comfortable and easy as watching TV. Lightweight clip-on NV attachment allows Schweitzer Optics to be with you night and day up to 24/7. (less)