Holosun 507 Comp Holosun 507 Comp 507Comp-RD handgun sight features a large 1.1” x 0.87” objective lens for enhanced shooting performance and Holosun’s new Competition Reticle System (CRS) with Holosun’s 650nm Red Super LED and up to 50k hour... MSRP: Was: Now: $399.99 Add to Cart