The Zero Kick Back Block is designed to work on any Autococker. It's made to replace the heavy aluminum one that comes stock on every Autococker, and its purpose is to reduce the kick/recoil during each shot. The decreased kick means your gun will remain much more steady while shooting. This makes long balling even easier. The upgrade makes a noticeable difference on any Autococker. TechT also plans on making a lightened bolt, so keep your eye out.