That's really not our choice. The choice as to how firearms would be regulated lies with the government and with the Governor in Council and with Parliament. The RCMP applies the laws that they create. Using a schedule or using the regulations is one way of identifying firearms that should not be in circulation. That system has the advantage of being able to name specific makes and models, and limiting the effect of the change in law to only those kinds of firearms.
As an alternative, a more general approach can be taken, as in amendment G-4, with a definition that applies automatically to all firearms that fit the criteria. The kinds of firearms and the numbers of firearms that will be captured by the definition will depend on the exact wording of those provisions. That is within the control of the Governor in Council and Parliament.