ERATAC's scope ring offers enhanced versatility and customization. They come equipped with ERATAC's exclusive Universal interface - a design that has already proven itself in the military/tactical field. These rings can be used to mount picatinny rails and special mounting plates directly to the scope, allowing the user to install various accessories without taking up any rail space. The scope rings are made from high-strength aluminum, and feature an existing height of 3mm, but can be increased with the use of spacers. ERA-TAC ERATAC Aluminum Scope Ring w/Universal Interface (fits 5-25x56 PMII Objective End) 03680-5762