Holosun 507 Comp Ronin [red]This red dot uses the Trijicon RMR footprint standard. Holosun Ronin HS507Comp is an open reflex sight built for competition, duty, and real world performance. Developed in collaboration with Tu Lam of Ronin Tactics, it uses the industry standard Trijicon RMR footprint, making it highly compatible with a wide variety of full size pistols, rifles, and shotguns. The oversized window design delivers rapid target acquisition and seamless reticle tracking