Detachable Top Mount Base - 402S, SilverManufacture ID: 48430Each 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. TeSpecifications:Package Includes 1 Base- Material: Aluminum- Style: Weaver- Finish: SilverFits: - Anschutz 1568 (Front)- Browning BBR (Bolt Action), Long & Short Actions (Front)- Churchill 950 & 950-C (Front)- Cooey 71 (Front)- Enfield Winchester 70 (Front)- Marlin MR7 (Front)- Navy Arms Country Boy Muzzleloader (Front & Rear)- Savage Axis Series, 10, 12 & 16 (Short Actions). Striker, Pistol, 510, 512, 516 S/A, 10 ML (2-piece ONLY) Pre 2003 Models. 110, 112, 116 (Long Actions) 210 (Front)- Savage Axis Series, 10, 12, 110, 112 (All Long Action Accutrigger), 10, 12, 110, 112 (All Short Action Accutrigger), 10 ML II (Rear)- Stevens Savage/Stevens 200 (Rear)- Shtg (use X-high rings)Pre 2003 Models. 10, 12, 110, 112 (All Long Action Accutrigger), 10 ,12 ,110, 112 (All Short Action Accutrigger), 10 ML II (Front)- Sears 53 (Front)- Stevens 110E, Savage/Stevens 200 (Front)- Winchester 52 with the hole spacing same. 70 Long Action with the hole spacing same, 670, 770, 70 Short Action (1984+), 70 WSM (Front)- Winchester 52 with the hole spacing the same (Rear)Note: Mounting Hardware Included.