I started with LaRue rails so I've never used any type of rail that didn't have them.
I did use Hogue tubes and never had one come loose but It wouldn't and won't really matter if it's just gonna be a hand guard with no front sight on it.
Even if it did come loose the gas tube would'nt let it come off on most types of barrel nuts. It might wobble back and forth but that's it.
