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: TrijiconA(R) - RMR & SRO HolosunA(R) Technologies - HS407, HE407, HS507, HE507, & HE508 Series Mfg: Reptilia Corp