Burris Ruger-to-Weaver Base Adapter adapts Ruger Integral Mount System platforms to accept Weaver-style mounting solutions. Constructed from solid steel with a matte black finish, this 2-piece base set is engineered specifically for Ruger M77 rifles configured with Eliminator Laser Scopes. It securely adapts factory integral receiver notches into a stable Weaver rail interface for dependable optics attachment on rifle setups. 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.