No, Spyderco does NOT make an assisted openner. These are the knives, such as trhe Ken Onion designed Kershaws that, once you start the blade openning in the normal manner, a spring finishes the task for you. A "gravity knife" is one where the blade may be "flipped" open by the force of gravity or, in more recent police and some court positions, centrifugal force. This situation is being used by the Canadian Customs to effectively ban all forms of one-handed openers, or so I understand, on the theory that a gorilla of sufficient strength could hold the scales of such a knife tightly enough and swing his arm strongly enough to overcome the strongest bias toward remaining closed that most such knives have.
I personally keep those knives of mine that have adjustable pivot screws sufficiently tight that it would take a lot of effort to accomplish the above, and I can still open any of them as quickly as most people can open an assisted openner, so I see no need for them. And I have been predicting what Knife Outlet has posted for some time. I do not believe that it will be police acting on their own, either. I believe that many jusrisdictions will outlaw them by statute or that the courts will extend the switchblade laws to cover them.
Understand, I find these laws stupid and pointless. They are like the laws from the 1840s and 1850s in many Southern and Western states that outlaw the carrying of Bowie Knives. In that earlier period, Bowies were seen as "the weapon that would end civilization as we know it" and were the subject of laws banning them in many states, including the home of the Bowie, Arkansas. After the movie, Blackboard Jungle came out in the mid-1950s and several similar "Grade Z" teen exploitation films made for the drive-in theaters followed, switchblades were seen in the same light and were banned by federal, state, and local laws. The bans on the Bowie were put into effect just as the Colt revolver made the Bowie irrelevant as a weapon and the ban on switchblades came into effect just as the availability of cheap firearms made them irrelevant for the punks. Besides, these bans miss the entire point that it is the one who misuses the implement and not the implement that is the evil and should be the target of law enforcement.