507Comp-RD Ronin series handgun sight features a large 1.1 x 0.87 objective lens for enhanced shooting performance and Holosuns new Competition Reticle System (CRS) with Holosuns 540nm Green Super LED and up to 50k hour battery life with a 1632 cell. CRS is an enhanced multi-reticle system with four components including a precision 2 MOA dot, an 8MOA circle, 20 MOA circle, and 32 MOA circle with multiple combination settings to suit individual shooter preference. 507Comp-GR is made from 7075 aluminum with an industry standard footprint, and includes Shake Awake technology. IP67 waterproof.