The AUS Mount for 30/34mm 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 Reptilia's DOT Mount line the AUS Mount attaches to any M1913 Picatinny rail via the anti-snag spring-loaded nitrided 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. Features:Matte black/flat dark earthMachined from billet 7075-T6 aluminumMIL-STD, Type III, hardcoat anodized