I never managed to locate one. Mine is dead and from the words of a person that I sent it to for repair, "junk" at this point.The only reason I am keeping it is to see if the parts from the QB57 I have would make the QB58 work again.If you do locate a parts diagram, please post a link to it.
Resurrecting an old thread because I am ready to tear into my QB58... How many set screws retain the barrel... only the one forward setscrew??and is the a disassembly manual out there?