Weaver

Each Weaver base is machined to the tightest tolerances for a custom fit. They are designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring. - Fits: - Browning BAR (Front & Rear) - Colt Coltsman in 264 30-06 round receivers (Front & Rear) - H & R 300 & 301 LA (Post 1973) (Rear) - Musgrave Models Mark I and II (Rear) - Schultz & Larsen (Rear) - Springfield 03 (Rear)