Thompson Center Arms Cross-Slot Base engineered for T/C G1 Contender, G2 Contender, and SSK-50 frame barrels. Precision-machined from solid steel with a matte black finish, this one-piece base provides maximum recoil resistance and eliminates structural flexing. Features a cross-slot interface compatible with Weaver-style and Picatinny rings, including high-tensile steel mounting screws and an installation wrench with a 25 in-lbs torque limit. Safety Note Always ensure the firearm is unloaded before installing or adjusting any optics or bases. Verify proper torque specifications during installation. Improper mounting may affect accuracy and safety.