Any gun registry is to protect the power of the government. It does not prevents criminality, on the contrary, by taking away the guns from population will increase criminality substantially, as proven in England and Australia. Since the strict gun controls now, in Toronto which in seventies use to be the safest city in North America and shooting in the city was unheard of, has no day without the shooting on the streets. With gun registry the government can confiscate any or all guns as they wish. In every communist country to own unregistered gun was punishable very severely by jail sentence of many years. Actually they feared even their own Air Forces, which was grounded when some communist honcho was flying away on some business trip. When German Army took over Czechoslovakia in 1939, beginning of the 2nd WW, Gestapo (Geheime Stads Polizei /State Secret Police) took the registry and ordered to surrender all weapons, including hunting rifles within 24 hours. Not compliance was punishable by the death sentence.
If you really want to know what is going on and how bad the real situation is and you want to preserve the democracy, than I strongly recommend the book by Mark.R. Levin "Liberty and Tyranny". No need to read the book if you desire Obama's socialfachismus.