The Burris Xtreme Tactical scope rings were designed to withstand the type of use typically found in battlefield environments. Used by tactical operators and competition shooters these rings have proven they are up to the task. Burris Xtreme Tactical Rings are designed to be as lightweight as possible while still providing you with superior clamping power to endure the constant beating from high recoil platforms. The rings are also able to withstand the rigors of daily life in an operational environment. So when ever shot counts, trust Burris Xtreme Tactical to assist you in getting the job done. Features and Specifications: Manufacturer Number: 420161 Burris Xtreme Tactical Weaver/Picatinny 30mm Scope Ring Low Black 30mm Tube Diameter Low Height 0.85" Picatinny/Weaver Style Mounts Ideal for Tactical Use Aluminum Construction Color: Matte Black Includes: Single Ring Only