Bingo..... if they sell them as 15, then they are legal. If they sell them as 10, they are legal. All mags fall into that category. If you try making them into something they are not, they become illegal. Hexmag got the ok to create a 15 round mags. Midwest makes perm 15 rounders, they are legal. Any mag made and altered that is not perm, are illegal. Cant word it any other way. Btw, I read somewhere that rivets dont cut it. You drill them out, then they become a 30 again. The rivet removed, doe