The Reptilia ROF Riser is an add-on plate for their ROF line. It moves the mounted red dot sight 2.5mm OR 10mm further from the host scope's centerline, providing extra clearance for tall turrets or larger-belled scope bodies. It's available initially for the Trijicon RMR and will include longer flat head 6-32 screws to mount a RMR.Compatible with:Trijicon - RMR & SROHolosun Technologies - HS407, HE407, HS507, HE507, & HE508 Series FeaturesMachined from billet 7075-T6 aluminumMIL-STD, Type III, hardcoat anodizedAdded Height: 2.5 mm. (0.1 in.) OR 10mm (~.4 in.)6 grams OR 16.3 grams