There is a square hole stud in the forend (used to unscrew the barrel) of my takedown model. I had (at one time) a schematic that listed all the parts with their names (it came from Numrich). Now they don't show the schematic online. I replaced the forend years ago with one that wasn't the correct style so I left the stud out. Now I'm going to replace the forend with the correct one and I've either lost the stud or put it in a "safe" place (so safe I can't remember where). Any ideas for a schematic/part?