I tried posting this on the KKF forum, but he nuked it and called it 'advertising'.
Kurt's .45 upper feeds from the middle, colt style, but I think he's going to be building one of his own and doesn't want to get whacked by Cav Arms low price. I didn't really figure that out until after I posted the pics over there...
Free market is a beautiful thing, isn't it?
Build it and they will come! I say, who doesn't want to feed my .45 bullets from a flattened Uzi mag...