I got a new to me Armi Jager Zouave made in 1974.Who ever owned it before me did not have an understanding using a properly fitting screwdriver. The tang screw is buggered up bad.My question is will the Euroarms ,or Chiappa screw fit as a substitute. The other problem is the nipple wont come off I have tried to let ballistol soak and use a repro period nipple wrench and that was no go. I let remoil soak for a couple days and tried a 12 pointed socket still did not budge.I Have not tried the propane or mapp gas. I called my local gunsmith he said he could drill it out but that is my last resort .