these solid metal bases offer maximum mounting flexibility. They work with all weaver-style, p. C. Tinny-style, and mil-spec rings. Burris has constructed a popularity for some of the most solid, dependable jewelry and bases available on the market. The proper shooting answer succeeds or fails due to the mounting machine. Earrings and bases are vital to getting and staying on target, spherical after spherical. Pick out from a huge range of patterns and sizes to match your shooting platform.