The Weaver Thumb Nut SPR Optics Mount is what you need for your rifle. This mount is designed for 30mm tube diameter optics, is made of aluminum, and comes in a black finish. The design of this mount gives you optimal height with a forward cantilever for AR platform rifles.
Specifications and Features:
Thumb Nut SPR Optics Mount
Optimal height with a forward cantilever for AR platform rifles