well im putting together a automag pump gun. i have all the parts or at least have the drawings for the parts except the body rail with the pump rod groove. i need to know dimensions of this slot so i can have it machined into a rail. if anyone has a rail and could measure it or has the engineering drawings it would be appreciated. i dont really want to guess on this. it the long slot on the top right of this rail. http://pittsburgh-music.com/paintbal.../picture12.jpg