The Holosun ARO-EVO is the ARO (Advanced Rifle Optic) EVOlved. ARO-EVO features an all-new 26mm housing design that offers a larger sight picture providing the user with more information for improved performance shooting along with the new lower 1/3 co-witness pedestal mount. The newly designed housing mates perfectly with the Holosun magnifier series and includes a new lens cap and anti-reflection device system. Additionally, ARO-EVO is available with the new Special Purpose Reticle (SPR) which is a bullet-drop compensating and ranging reticle which balances the performance of a 2MOA dot with accuracy at intermediate distances. ARO-EVO is available with the Special Purpose Reticle or a 2MOA dot only in Red, Green, and Gold.Up to 50,000 Hour Battery LifeShake Awake Technology with Last Setting RecallSolar Powered FailsafeIPX8 Waterproofing8 Daylight and 4 Night Brightness Settings1.02" Window Size