Aperture Sights are easier and faster to use than open sights. With this peep sight you get High precision at reasonable cost. It has a compact design and can be used on a sporter or match rifle. This zero backlash peep sight is made of rust proof alloy and can accommodate different dovetails . To use the Aperture sight with your SX, NX or VX air rifles, an additional adaptor is required to be purchased which will accommodate the Front Peep Sight.