Wolverine 1x23 CSR Red Dot SightThe Sightmark Wolverine CSR Red Dot Sight is a close range optic designed specifically for shotguns and short barreled rifles. The CSR sports a 4 MOA red dot reticle with a 23mm objective lens and adjustable digital switch brightness controls. Compact and lightweight, the CSR weighs just 10. 3 ounces and boasts extremely low power consumption, with 1,000,000 million hours battery life on low power and 50,000 hours on setting 6 from just a single AA