Reptilia 100-116: The AUS Mount for 30mm diameter magnified optics, from Reptilia. Like the Dot Mount line the AUS Mount attaches to any M1913 Picatinny rail via the anti-snag spring-loaded nitride steel clamp and custom bolt mounting system which can be tightened with either a 5/32 hex or a flat blade driver to sit flush with the body of the mount for a low-profile, streamline design. Also like the 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.