I have two milled Yugoslavian style AK receivers that I bought when Assault Weapons of Ohio were having their blowout sale. Anyway, when I finally got my hands on them, and my excitement wore off, I noticed that both of my receivers start to bow outward where the rails end. I assume this is from the heat treating, and the differences in the thickness of the steel in the area in which the rails end. While I am certain that this will have no effect on the functioning of the rifle, I would like, to at least, straighten them enough to make it less perceptible. So what can I do, I have contemplated wrapping the receiver in leather, and squeezing it gently with a large C clamp, or vise with blocks of wood. Here are some pics: This will be my first build of any kind.