DEMO DNZ Products Game Reaper Scope Mount - Tikka T3 High Ring 20 MOA 30 mm Tube Black Matte 32552. Base screws are 6-48 X 1/4 long. Ring screws are 6-40 X 5/8 long. Both screws use a 7/64 Allen wrench. All T3 actions are the same length. Outside to...