Yes proof has plain old SS barrels, and I use them, and I'm not a fan of carbon fiber...Thanks Ray for that information. I have an MRAD and am working with a gunsmith on a new 308 barrel. Does Proof make just plan old vanilla s.s. barrels? I'm not a fan of the carbon fiber one that they have for MRAD, but finding a barrel conversion kit for the MRAD is very difficult these days.