Telescopic sight’s or more commonly called scope’s are used on sniper riffles to help improve you aim. based on a optical refracting telescope. They normally have a crosss hair or graphic image pattern (reticle) to give an accurate aiming point on lots of the sights you will be able to set the brightness level or colour (red or green) The Telescopic sights for sale on the site are used with our bb guns but they are very good quality and can be used on air riffles and high end airsoft guns ect. sights are arranged in terms of magnification and lens diameter, e.g. 10×50. This would mean 10 times magnification with a 50 mm objective lens. larger objective lens diameters, due to their ability to gather larger amounts of light provide a brighter image at the eyepiece. telescopic sights with variable magnification. The magnification can be changed by manually turning the zoom dial. Variable sights give more flexibility regarding shooting at varying ranges, targets and light conditions and offer a more wide field of view at lower magnification settings. The way the ratings work for variable sights is minimal magnification – maximum magnification × objective lens, for example, 3–9×40. all telescopic scopes do not come with any mounting brackets (Scope mounts) the mounts come in two parts the scope base (that fits the gun rail) and the scope rings (to hold the scope) so make sure you get the right mount for your Telescopic scope.