Hello, I have a Zabala 16 gauge SxS Imported by Kassnar/Charles Daly. I wanted to fix a broken firing pin that it has, but there are no 16 gauge firing pins! I was wondering if you can use a 20 gauge firing pin in the 16 gauge. I noticed some of the other parts are interchangeable. Here is a link to the parts list. http://www.gunpartscorp.com/Manufacturers/Kassnar-33329/Shotguns-36854/SideBySideFieldGradeNon-AutoEjectZabala-41060.htm?results=100 Any help would be appreciated!