Introducing the 1.70 inch bore height AUS Mount for 30mm diameter magnified optics, from Reptilia. Driven by the request of an end user group, the AUS Mount is the culmination of a 2 year development program. Like the DOT Mount line the AUS Mount attaches to any M1913 Picatinny rail via our anti-snag spring-loaded nitride steel clamp and custom bolt mounting system which can be tightened with a T-25 Torx or a flat blade driver to sit flush with the body of the mount for a low-profile, streamline design. Also like our DOT Mount line, the AUS mount is machined from a single piece of billet 7075-T6 aluminum and is finished with MIL-STD Type III, Class 2, hard anodize coating.