If by basis you mean current, I can't give you Canada but I can Australia.
The laws changed after 1996 with a public outcry not dissimilar to what is happening in the US now.
The "Port Arthur Massacre" as it has become known was perpetrated by a madman (I refuse to use his name) killed 35 people (women, men and children) and injured a further 26.
At the time semi auto centre fire weapons (assault rifles) were only available with a special permit for collectors and or those wishing to shoot controlled scenario or drill type range stuff. (assault type rifles were not used to perpetrate the massacre)
Handguns also required a special permit and a individual license for each weapon. Other restrictions applied such as the mandatory membership at a pistol club/range and if my memory serves me a minimum amount of time at that ranges. Other than traveling to and from the destination of usage pistols must have been locked away out of public view.
The only exception was if you required them for your occupation. Home defense has never been a valid reason to own a handgun in my 43 years.
All other sporting, target and hunting firearms required registration and a licensed owner. Licensing required a small tick the box questionnaire after a short course on firearms safety held usually at regional police stations.
After the 1996 massacre mounting public pressure forced gun reform. This took place in a number of ways and areas.
1. State firearm data bases were linked and laws unified
2. Semi Automatic weapons of any kind were placed into a special permit category. This category operated on an exemption basis and if you had a valid excuse to own such weapons then a permit was issued with restrictions. These included specifics on how these are to be used ie if you were permitted for target then hunting with them was illegal etc. Further restraints were put in place such as the logging at your local police station in a local register and spot storage premises inspections.
A buy back scheme was introduced to offset the out of pocket cost to owners, the remuneration was little compensation to most including myself. Firearms now placed on the restricted list included any semi auto rim/centre fires and shot guns and any pump action rifles and shot guns (any fast repeat firing weapon, stupid part is lever actions are still OK). Any weapons procured through the buy back scheme were crimped (destroyed, I watched my XTR pump action trap gun and Ruger varmint rifle folded in half). I qualified for an exemption yet I chose not to have the law on my door step every time someone heard a volley of shots.
3. Penalties were increase substantially to discourage ownership of unregistered or "black market" firearms including jail time.
4. Licensing, testing, cooling off periods and back ground checks all were tightened.
Statistics from the government say that the change in laws have saved 200 lives per year since 1996 with the majority of these being suicides. We still have gun crime committed using legal and illegal weapons albeit may be less yet the wholesale removal of life has not been repeated.
Firearms are part of my "tools of the trade", just as essential as my harness, rope, tractor and livestock. Whether its euthanasing stock, removing feral pests or keeping predators at bay they are essential.
I have never had a requirement for a military type assault weapon nor the exceptable excuse in the laws eyes to own one so I don't miss one.
When I lost 2 firearms in the buy back it was a blow as I admired the workmanship and gunsmithing in both yet purchased 2 legal weapons as replacements that more than suffice.
When I was a young fella I use to hunt and stalk game shoot camel, horses and pigs for a dollar and I never had the requirement for a auto/semi auto weapon as I relied on my accuracy with a bolt or lever (quality not quantity).