The 35mm ROF-90 is a drop-in upgrade designed for the Reptilia AUS mount or Geissele Super Precision. It adds a 90 deg (12:00) mounting point for a Trijicon RMR, enabling a fast transition to a non-magnified optic for close-range target engagement. The RMR can be zeroed for use with subsonic cartridges like .300 AAC Blackout, while the magnified optic remains allocated for supersonic ammunition. For use with Reptilia AUS mount or Geissele Super Precision mount, offering secure and reliable mounting options Expertly machined from high-strength billet 7075-T6 aluminum for durability MIL-STD type III hard coat anodizing enhances durability and longevity in rugged environments Weighing 33 g, this lightweight construction provides ease of use and portability while maintaining durability and functionality Proudly made in the USA, ensuring top-tier craftsmanship and quality