Maxima Encore / Omega Riflescope Base from Thompson Center Arms.
Engineered specifically for Omega and Encore Rifles. Accepts all Weaver®-style rifle scope rings. A sturdy, strong, rugged mount. Stable enough for high-recoil firearms. Uses Torx screws, which can be tightened up to 25% more than conventional hex screws. Single-piece steel construction. Realtree Hardwoods HD® camo finish.