ROF-90 ONLY COMPATIBLE WITH REPTILIA AUS MOUNTS AND GEISSELE SUPER PRECISION MOUNTS ! The Reptilia ROF-90 is a drop-in upgrade for magnified scope mounts. Built for the Reptilia AUS Mount or Geissele Super Precision 30mm optic mount, it adds a mounting point for a Trijicon RMR to provide a fast, close-range optic to your magnified scope. Each ROF model is designed to minimize each optic's distance from the host scope's centerline, while ensuring enough clearance that the sight picture isn't obscured. Compatible with: Trijicon - RMR & SRO Holosun Technologies - HS407, HE407, HS507, HE507, & HE508 Series Features: For use with Reptilia AUS Mount or Geissele Super Precision Mount Machined from billet 7075-T6 aluminum MIL-STD, Type III, hardcoat anodized 34gr Made in USA