Originally Posted by Ubergopher
So, forgive me this blasphemy, but say I lost my mind... I'd be able to put this on a lower registered as an AR-15 pistol and be good to go as a pistol right?
I believe you would be okay as long as the lower stayed in "pistol" configuration. I am unsure about how the recoil operation would transfer though. I would assume straight across, but who knows? You might have to alter your buffer & spring for the round, or it might be a direct plug and play.
Might be a good question for the folks at AAC though, I bet they have already encountered this situation.