The Holosun HS507C-X3-RD-MRS updates the proven 507C platform with a reinforced housing, advanced brightness control, and Holosun s Multi-Reticle System in a compact optic built for modern pistols. Designed around the RMR footprint, it delivers a low-profile solution that works just as well for everyday carry as it does for duty and range use. A forward-facing photodiode pairs with Solar Failsafe to automatically manage brightness as light changes, while manual controls with memory and lockout give shooters full authority when needed. Powered by a side-loading CR1632 battery rated up to 100,000 hours and backed by Shake Awake, IP67 waterproofing, and 5000G vibration resistance, the HS507C-X3-RD-MRS blends versatility, durability, and smart power management into one no-nonsense pistol optic. Product Specifications Reticle: 2 MOA Dot & 32 MOA Circle Light Wavelength: 650nm Reticle Color: Red Parallax Free: Yes Unlimited Eye Relief: Yes Magnification: 1x Multi-Coatings: Yes Window Size (in): 0.91 0.67 Dimension (in): 1.78 1.31 1.1 Weight (oz): 1.55 Housing Material: 7075 T6 Aluminum Surface Finish: Hard Anodize Adjustment per Click: 1 MOA W&E Travel Range: 50 MOA