No idea on that... I don't know if they will go the whole 'constructive intent' route if you have a brace and a gun that it will fit, but it isn't actually attached.so NO brace of any sort or manufacturer can be in the possession of a legal gun owner? can a brace be on a 16" barreled weapon?
I'm sure a brace can be on a 16" rifle since that's one of the 'solutions' they give in their little chart.