Holosun 507C X3 [red]This red dot uses the Trijicon RMR footprint standard. Holosun HS507C X3 RD MRS is an advanced open reflex red dot built for pistol platforms using the RMR footprint. It combines a versatile multi reticle system, durable aluminum construction, and intelligent power management to give you full control over speed, precision, and reliability in any shooting scenario. One optic, multiple aiming styles The Multi Reticle System lets you switch between a