Integration offers strength and consistency. Browning's T-Bolt Integrated Scope Mount System unitizes the ring and base into a single, ultra-rigid unit. Machined from 7000 series aluminum alloy. This eliminates alignment problems and the possibility of a loose connection between the base and ring.Features:Available in .400" Standard height onlyMachined from 7000 series aluminum for high strength and durabilityThe integrated design eliminates alignment problems and the possibility of a loose connection between bases and ringsStandard ring height is for scopes with up to a 44mm objective with a standard barrel contour.