Finding a compatible mounting system can be confusing. Warne designed the modular Red Dot Riser to fit a wide range of different optics based on the mount footprint. This red dot sight riser is designed to offer easy height adjustments with the included 0.180" spacer, allowing the user to dial in the perfect MSR height for their optic and rifle combination. All riser mounts share a robust mounting base, while the top is engineered specifically for different red dot styles.