Did you notice the S&W AR-15 has a key-lock on the side of the receiver, a mag safety, a MIM barrel, bandaids inside the pistol grip, a warning on the side of the barrel not to poke yourself in the eye with a fork - AND, when you back up while holding the rifle, it beeps loudly, like the forklifts at Home Depot...
They don't give you the keys to the internal lock, though. They are stating, that if you get into trouble and need to unlock the gun, call 911 first. If, after an hour or so, the police haven't shown up, call S&W between 9 a.m. and 5 p.m., M-F and they will mail you two keys. You'll have to provide a serial number, though.