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.