Green Blob Outdoors 30mm / 1 inch Cantilever Scope Mount w Interchangeable Scope Ring Caps fits Picatinny / 20mm Rails for Burris Leupold Vortex Nikon Scopes Green Blob Outdoors--- 30mm / 1 inch Riser Mount for Rifles with Picatinny / Weaver Rail, Ring bases are milled as a single, tough unit, and both front and rear ring tops feature Picatinny tops for mounting additional accessories. Easy installation with minimal effort over the rifle barrel and the cleaning rod PEPR Proper eye position ready for combat rifle for Burris, Vortex, some Nikon models, Leupold, and many others. This mount provides 2" of forward scope positioning on the .223 flat top platform.