Yeah but then they would also have to make short hand guards and a short piston. Then there would be all that tedious testing.

It would definitely be a
challenge.
I'm not sure if Lector could get his Homies to work on this project. Especially to offer complete rifles, with Dlask XB2's, stock adapters and extended mag releases. I think it would sell pretty damn good. But what do I know?
Edit: I like the photos Lector posted above as well. I would like to see one done up with Lector's preferred scope and mount.