This oversized competition grip from Volquartsen features a thumbrest, heelrest and finger grooves which allows for complete control for one or two-handed shooting. Comfortable, durable urethane construction provides ergonomic support and reduces felt recoil. The MKIII Volthane Grips come standard with an Extended Magazine Release Button that is designed to be installed from the inside of the grip panel and is then held in place once the grip is tightened to the frame. Please note that this Custom Grip fits the Ruger Mark 3 only. Includes 4 allen head screws and washers.