Leupold Std Browning A-Bolt Lr 2-Pc Base Matte 50030 Two-piece STD base offering maximum accessibility to rifle magazine Machined steel construction; fits both right- and left-handed actions Bases work with variety of mounts, including long-range STD mounts Reversible bases are also available for many actions; matte black color Low and Medium Dual Dovetail rings available in Gun Metal Gray finish.