The forward vertical grip does nothing to 'control' a handgun. It does make it harder to sight and shoot. Its legal, as mentioned, if you want to spend another $200. The darn thing looks SO 'tactical' though, I am sure many gear freaks will be buying them.
Nemo Me Impune Lacesset
"The trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so.".........Ronald Reagan