Im going to e-mail Dlask and ask! They are about a 45 min drive away from my front door so ill see what i can scrub up.
It looks like it attaches to the upper reciver then to the front gas block, kinda negating the free float barrel by tieing it to the rest of the gun. But i guess in CQB you dont have to have a tack driver out to 500 yards or more. 203s have been attaching to the barrel for a long time so ... ?