Thompson Center Arms Cross-Slot Base engineered for T/C Encore, Omega, Triumph, and Impact rifle and muzzleloader barrels. Crafted from lightweight, high-tensile aluminum in an anodized matte black finish to minimize glare and resist corrosion. This rigid single-piece base features a low-profile cross-slot interface compatible with Weaver-style rings, utilizing a secure 4-screw mounting configuration 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.