AGS Cobalt Rifle Scope 4-16 x 50, Rifle Scope designed for Airgun and Rimfire Rifles with parallax set at 35 yards with Half Mil Dot Reticle - Spring, PCP & Gas Ram Rated - One Inch Tube - Wide Field of view with Cobalt Lens Coating with 3/8" Double Screw Match Mounts, illuminated Half Mil Dot Retic..