These solid steel bases offer maximum mounting flexibility. They work with all Weaver-style, Pica tinny-style, and mil-spec rings. Burris has built a reputation for some of the most solid, reliable rings and bases on the market. The perfect shooting solution succeeds or fails because of the mounting system. Rings and bases are vital to getting and staying on target, round after round. Choose from a wide range of styles and sizes to match your shooting platform..