Can it be done? Probably. However, for the cost involved, you'd be able to buy at least 10-20 round magazines. Buy an aftermarket USA brand mag for $10, trade it for an Armalite conversion kit for $30 and add a new GI spring and floorplate from Elite Firearms for $3.50. Total cost = $43.50/mag. People pay more than that for USGI M14 mags.