With the increasing number of electro optics being used finding a compatible mounting system can be confusing. We designed our modular Red Dot Riser to fit a wide range of different optics based on the mount footprint. This Reflex Sight Riser is designed to offer easy height adjustments with the included spacer allowing the user to dial in the perfect height for their optic and rifle combination. All riser mounts that we offer share a robust mounting base while the top is engineered specifically for different red dot styles. - Fits: - Burris Fast Fire 2 & 3 - CMORE RTS & STS - Doctor - Eotech MRDS - Holosun 507c/407c V1 versions - Holosun 507c/407c V2 versions - Insight MRDS - Leupold Delta Point - Leupold Delta Point Pro - Shield RMS - Sig Romeo 3 - Sig Romeo 3 Max - Sig Romeo 3 XL - Trijicon RMR - TruGlo - UTG Reflex Micro Dot - Vortex Razor - Vortex Venom - Vortex Viper - And others with same hole pattern(s) - All risers include a .180 thick spacer - Designed and MADE IN USA