Reptilia, AUS Mount, 30mm, Anodized Finish, Black, 1.70" Bore Height NEW Machined from billet 7075-T6 aluminum MIL-STD, Type III, hardcoat anodized 30mm diameter bore 1.70" bore height Made in the USA Product Description Introducing the 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 their DOT Mount line the AUS Mount attaches to any M1913 Picatinny rail via their 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 their 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.