This is a Weaver Ring known as the Grand Slam, model 49309.
Weaver's popular Grand Slam Rings recently went under the knife for an impressive" sleek" modern new look. The four-hole design with Torx screws adds gripping strength and added security. Plus" Weaver's legendary cross-lock design provides the ultimate in scope lock-down. Made of solid steel" these rings stand strong against aggressive recoil. To top it off" Weaver's newly-designed Grand Slam Rings are proudly made to exact tolerances in the U.S.A.
Features:
Steel construction
Provides ultimate grip
