Developed from the operational experience of the Magpul Dynamics team, the B.A.D. Lever (Battery Assist Device) is designed to considerably improve the speed and efficiency of the AR15/M16 bolt catch. The B.A.D. Lever quickly addresses reloading and malfunction clearance shortcomings of AR15/M16 platforms by extending a paddle to the right side of the weapon, allowing manipulation of the bolt stop from the fire control/ready position with the right-hand trigger finger. $30 from Magpul.