I recently acquired an excellent phosphate bcd 4 barreled receiver and I would like to try and put it back as close as possible to it's original configuration. There is only the serial number on the barrel and all of the other parts are a mixture of phosphate and blue stamped metal with no serial numbers. I currently have a matching 214 waffenamt marked bolt and another matching bolt which has what appears to be a 93 waffenamt. I can't find a information on a 93 Waffenamt so I don't know if I'm reading it correct. (old eyes) The latter bolt has the round gas holes. Would either of these bolts be acceptable as replacement bolts or should I look for another manufacturer. I would also like to know which stock would be most correct. Any help or opinion appreciated.