Mount your Optics with the maximum stability of a single-piece platform. The Warne R-M681M base is precision CNC-machined from solid steel with a matte black finish, offering a low-profile, rock-solid Weaver/Picatinny interface for H&R M681M rifles (and others like the Marlin XL7). Its full-width recoil slots ensure a secure grip against magnum recoil.