The dealer maintains their own record but those are not handed over to the government and it is not possible to do lookups by a person's name, only by serial nu

The dealer maintains their own record but those are not handed over to the government and it is not possible to do lookups by a person's name, only by serial number. So police can trace ownership history of a specific weapon, by going from dealer to dealer - until it has entered the private market - but they cannot get a list of everyone that owns a weapon.