I don't see any anti-rotation locks, nor do I think any light weight rail without a Picatinny spine will hold up. But it's your money.
I don't see any locks either. Guessing it just relies on the tightened barrel nut, which means it is adequate for now but likely to get changed out down the road.
As to the Picatinny spine, the base (to the bottom of the slots) is there, it is just missing the ridges, which add weight but nothing to strength.
Good point on the locks. For now my intent is to get the thing and running. Still need the barrel and BCG. Haven't decided on the BCG but looking hard at Ballistic Advantage for the barrel. Any experience with their stuff? (My goal is MOA accuracy, not match accuracy.)
