Got a hold of some pre ban USA mags. After inspection they seemed ok but I tried running some rounds through them and they just dont work how they should. Has anyone used the the top of a ruger factory 5 or 10 round mag to replace the thin aftermarket ones? It appears to be just a matter of dissasembly and then measuring and cutting evenly and then just squaring up the new top nice and butt welding with the mag body. It seems like it would be more cost effective then hunting down fac hi cap mags. Please everyone let me know what you think.