So I remember reading there were one or two groups working on bringing new AR180 uppers to the market, possibly using standard AR barrels. Does anyone know if these projects are still in the works, or were they discontinued?

Seems a shame that Nodak makes such nice AR180 lowers but there doesn't seem to be any uppers available.

Tagged for an answer.  I've got an NDS lower.  I've been dying to put an SBR upper (thinking 11.5" barrel) on it.

There's a thread in the GD about the AR180 now.

GD Thread