I will always vote for Flatliner333's mag until it wins.
This is an AMAZING one-off build: http://www.automags.org/forums/showt...llkrusher-quot
A stainless insert "U", with the "body washer" hole in the bottom could hold the valve and reinforce the shell. Not printable, but
I like that illustration.
ohh maybe ill just make a one off lol