Thompson Center Scope Base Features The Thompson Center Arms scope base is machined from aluminum and finished in a matte black anodized coating that resists wear and corrosion. It mounts directly to the factory drilled holes already present on compatible Contender barrels so no drilling or tapping is required at install. The one piece design measures 5.5 inches long and 0.4 inches tall providing a low profile mounting surface that keeps the optic close to the bore. Screws should be tightened to 25 in-lbs for a secure lasting mount. This base is built for cross slot style scope rings a mounting standard that has long been used on Thompson Center barrels for a stable repeatable zero. At roughly 2 ounces the base adds minimal weight to the firearm while still providing a rigid mounting platform. Its black finish matches most Contender barrel finishes for a clean factory look once installed. This scope base gives Contender shooters a simple reliable way to add optics to their setup. Thompson Center Scope Base Specifications Manufacturer: Thompson Center Model: Scope Base Type: One-Piece Picatinny-Style Cross-Slot Base Material: Aluminum Color: Black Finish: Matte Anodized Length: 5.5 Height: 0.4 Weight: 2 oz Compatible Hosts: Thompson Center Contender Available At: GrabAGun