I need to buy (or maybe build, although it'd be my first build) a lightweight carbine upper just like Colt's AR6720 upper. It has to have a carbine gas system. It's going to be for my wife. I looked on BCM's web site (we order a lot from them) all they seem to have for lightweight uppers are mid-lengths. Anyone know of any places that might have or might be able to get lightweight carbine uppers? I want a good quality made Mil-Spec upper.
Thanks, NYH1.

