This is the Industry Brand Target Aperture Rear Sight as fitted to the AR2078/9 series of CO2 rifles and the BS4 spring gun. Fits most air rifles with standard 3/8-inch scope rails without a "hump" between the rails. The sight provides precise 1 minute-of-angle click adjustment for elevation and windage and includes an efficient rubber eye cup to minimize stray light affecting the sight picture.NOTE:
This sight also fits the IZH60, IZH61 and Daisy Avanti Champion 499 air rifles.
Does NOT fit the QB78, QB78 Deluxe and QB79 models unless these are also fitted with the Archer Airguns AR Breech Kit. This is due to the curved breech projection above the scope rails milled in the breech of these guns.