Queeghi

I am thinking of creating a fallout-based ak47 with a shovel stock and I have a full stock ak with the battery within the stock. Since the battery couldn't fit in the shovel stock, is there any way I could change it so that it fits under the cover? I don't mind getting a new stick-type battery, but I don't think I would want to get a new receiver since the shovel stock needs a full stock receiver.