Zero Tech Optics THDMM21: Introducing the Thrive HD Multi Reticle Red Micro Reflex Sight, an exceptionally lightweight and slim line optic designed for superior target acquisition. Equipped with advanced shake awake technology. The multi-reticle system offers flexibility, allowing users to adjust the sight to the specific needs of each scenario, enhancing acquisition speed and re-engagement post-recoil. Includes: ZT Thrive HD Micro Reflex Sight, Rubber Protective Cover, Microfiber Lens Cleaning Cloth, Hex Keys for Sight Attachment, Three (3) sets of mounting screws