Sounds like a good list so far. I'd look at criterion, wilson combat, and even windham weaponry. I've shot with some guys that use ballistic advantage and they seem to be reliable and fairly accurate/consistent shooters. I've also shot with some guys that have been using bison armory barrels with good success. The main problem right now is finding barrels, but they are out there if you search hard enough. Also, are you looking for chrome lined, stainless or does it matter?
