Warne Mfg 6103M: 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 t 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 specially for different red dot styles. Includes a .180\" thick spacer. Fits- Burris Fast Fire 2 & 3; Cmore RTS & STS; Doctor; Eotech MRDS; Holosun 507c/407c V1 & V2 versions; Insight MRDS; Leupold Delta Point & Delta Point Pro; Shield RMS; Sig- Romeo 3, Romeo 3 Max, Romeo 3 XL; Trijicon RMR; TrueGlo; UTG Reflex Micro Dot; Vortex Razor, Venom and Viper. Fits others with the same hole patterns.