The X1 Micro Reflex Sight is RMR Footrpint compatible from Rival Arms and features a 3 MOA Red Dot Reticle. The 29 mm objective allows for a wide field of view with 10 brightness settings. The X1 Micro features Motion-Sensing "wake" ability as well as an automatic wake and seep mode to preserve battery life. The X 1 Micro remembers last brightness setting used when powering on. IPX7 waterproof.