Weaver Grand Slam Rings are offered as a one or two-piece system, these all steel bases provide recoil resistance and feature the Dovetail Locking System for an ultra-secure, positive-lock on rings. Our extensive line of bases provides a precision fit to custom match your Weaver rings of choice. Whether you need a base to accommodate your modern sporting rifle, a competition pistol, inline muzzleloader or your favorite bolt-action hunting rifle; every one of our mounts delivers a solid start.