Not to mention expensidive!!!!thats pretty ridicules.
Wait a minute... doesn't that have one of those little "things" on the back of the slide that converts it into a happy gun? I think that is what that is... the picture must be taken overseas somewhere (seeing as these accessories are made in Israel)
First, installing the foregrip and stock would turn a Glock pistol into an illegal NFA weapon, unless you first paid your $200 tax stamp and registered it as either an AOW (foregrip) or SBR (stock and foregrip). Or unless it's on a post-sample machine pistol as shown above.