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: Pre-2003 Long Action Savage Models 110, 111, 112 (R, V, & FV), 116 FSS; 210 Shotgun; Striker Pistol Note: Mounting Hardware Included.