The Holosun ARO EVO GD2 packs high-performance optics into a compact gold dot sight built for speed and accuracy. With Shake Awake tech, dual mounts, and a crisp 2 MOA dot, it's ready for everything from competition to patrol. Designed to run on solar or battery power, this optic adapts to your environment and never quits. 2 MOA gold dot reticle Solar Failsafe auto-adjusts brightness Shake Awake with last setting recall Up to 50,000-hour battery life Dual mount heights included (1.63" and 1.15") 6061-T6 aluminum housing with hard anodized finish Compact 26mm housing with wide sight window IPX8 waterproof rating and 1000G vibration tested