My brother has two and I have a CWA top end on a 1911 frame. Lots o fun. One of my brother's has the alloy GSG frame, CWA top end, a comp, and a bunch of other stuff. His is better balanced than mine which has the steel frame and no comp. I might end up getting the GSG and swapping my top end unto it. My brother's other is a stock GSG which is a nice gun by itself. You can't go wrong with these GSG's and they are a bargain, too.