Holosun ARO CORE Red Dot Sight The Holosun ARO CORE Red Dot Sight is a compact, rugged rifle optic built for fast target acquisition and reliable performance. Featuring Holosun's Multi-Reticle System (MRS), users can switch between a 2 MOA dot, 65 MOA circle, or circle-dot reticle to suit different shooting scenarios. A 22 mm viewing window provides a clear sight picture, while Shake Awake™ conserves battery life by automatically activating the optic when movement is detected. The side-loading CR2032 battery allows replacement without removing the sight or losing zero. Constructed from durable MAO-finished aluminum with an IP67 waterproof rating, the ARO CORE includes both 1.63" Lower 1/3 Co-Witness and 1.05" Low mounts for compatibility with a wide range of rifles and PCCs. Key Features Multi-Reticle System (2 MOA dot, 65 MOA circle, or circle-dot) 22 mm viewing window Shake Awake™ with Lockout Mode Side-loading CR2032 battery 10 daylight and 2 night vision brightness settings MAO-finished aluminum housing IP67 waterproof Includes Lower 1/3 and Low mounts Specifications Reticle: 2 MOA Dot / 65 MOA Circle / Circle-Dot Window Size: 22 mm Battery: CR2032 Brightness: 10 daylight, 2 NV Waterproof Rating: IP67 Mounts Included: 1.63" Lower 1/3 Co-Witness 1.05" Low Mount