In the context of the average person being able to go into a store and walk out with a firearm after a basic background check, or to be able to sell someone a firearm legally in a parking lot, I doubt the US is surpassed anywhere in the law abiding world.
Too restrictive. Many of the places I have lived you can buy a gun without a background check if you have a concealed carry permit.
If you want to compare other countries you can try this website:
http://www.gunpolicy.org/firearms/region/
I must warn you that they are strongly anti-gun. Where a country has a right guaranteed in their constitution (say Argentina, Iraq or Afghanistan) they ignore it. If they don't have a right in law (say Latvia, Estonia or the UK) then they say they don't have a right. This is a bias where they choose to ignore evidence that does not support their cause.
I should point out that Argentina is a country with a high rate of ownership and a low murder rate (through guns). The rate has held at about 50% lower than the US (officially). In Argentina SBR and SBS are legal and full auto weapons are obtainable, although I don't know how legally. Licensing is supposed to onerous.
The site also ignore gun deaths caused by foreign nations and by the internal security forces of the nation. For example the invasion of Georgia which resulted in wide spread civilian casualties is ignored as is the genocidal campaign against Christians in Sudan the last few years. They simply don't report data that conflicts with their world view.
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