hey guys i found 3 mags for sale. but i dont really know what im looking for. i plan to use for archeology.and dont know if any of these will work for my application. hoping one of u could help me. one is a walker sci. fluxgate fgm-3d1. another is a automation forster mf 2000. the other i think was military. its a scintrex modelmk22 modo, part#5206126.the front says viw 2302e3. if anyone could tell me if one of these would be good for archeology surveying i would appreciate it. thank you