The 34mm ROF-45 is a drop-in upgrade for the Reptilia AUS Mount or Geissele Super Precision 34mm optic mount. The ROF-45 adds a mounting point at 45 (01:30) for a Trijicon RMR to provide for quick transition to a non-magnified optic for close-range target engagement.Features : For use with Reptilia AUS Mount or Geissele Super Precision Mount Machined from billet 7075-T6 aluminum MIL-STD, Type III, hardcoat anodized 27 grams Made in USA