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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.

Specifications:

- Base Type: 1 Piece Base
- Material: Aluminum
- Style: Weaver
- Finish: Gloss Black

Fits:

- Marlin 57 Magnum

Note: Mounting Hardware Included.