The Leupold Carbine Optic (LCO) is a dream come true for carbine operators. The compact 1x red dot sight gives you natural, rapid target acquisition. The LCO's 1-MOA Dot reticle has 16 brightness settings to let you find the exact intensity you need in any conditions. At its highest setting, the dot will shine bright in the middle of the day, and it is night vision compatible on lower settings. The manual push-button on/off switch with integrated brightness control puts all the power at your fingertips. Using a common CR123A 3v Lithium battery, the LCO has a battery life of up to 5 years. The machined aluminum body provides the utmost in durability and the 1/2 MOA adjustments make sighting in fast and easy. The LCO is built for a lifetime of punishment and is backed by the Leupold Gold Ring Full Lifetime Guarantee.