Thompson Center Arms Cross-Slot Base engineered for T/C Encore, Omega, Impact, and Triumph platforms. Precision machined from solid steel with an anodized matte black finish, this heavy-duty base completely eliminates structural flexing under heavy recoil. Features a cross-slot interface compatible with Weaver-style and Picatinny rings, ideal for magnum charges and heavy centerfire calibers like .300 Win Mag or .45-70 Gov't. 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.