Crimson Trace Corporation, RAD Max Pro, Large Open Reflex Sight, Black, 3 MOA WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov. Battery Life: 50,000 Hours Top Accessible Battery Compartment Designed For Carbines and Shotguns The CT RAD Max Pro (Rapid Aiming Dot) Electronic Sight is a maximum sized Open Reflex Sight for carbines and shotguns. Featuring a red 3 MOA aiming dot, the CT RAD Max Pro has a recessed and fully multi-coated lens with a large quick acquisition window. The CT RAD Max Pro comes with the CT RADIANT Ambient Light Sensor that automatically adjusts the aiming dot's brightness to the surrounding lighting condition. The CT MOTION Sensor detects movement of the firearm and automatically turns the reflex sight on. The sight powers off after 2 minutes of zero movement. The CT RAD Max Pro comes with an AUTO Shutoff Function that automatically shuts off after 8 consecutive hours of operation to conserve battery life and a manual ON/OFF Function that allows you to turn on or off the sight by using the side brightness buttons. The CT RAD Max Pro is easily installed on most any MILSPEC M1913 Picatinny Rail. It also has a Full Co-witness mount for use with carbine backup iron sights. The CT RAD Max Pro has large brightness setting buttons for easy use even with gloves on. Made of 7075 Series Aerospace Aluminum, it is 30% stronger than most industry standard sights made with 6061 Series Aluminum. The entire CT RAD family has an Innovative top strap design that deflects force if the sight is dropped.