Someone's probably answered this one before, sorry if my question appears stupid. I seem to remember that combo AR15/Mini-14 mags were produced at one time, and considering the ready availability of metal hi-cap AR15 mags, couldn't someone with a mig welder and a drill modify AR15 mags to create workable Mini-14 mags? Would it be legal to do so? If the answer to both questions is yes, someone could satisfy an obviously strong demand for Mini-14 mags with inexpensive mods to reliable magazines.