Map found on interwebbies.
https://en.wikipedia.org/wiki/Estimated_number_of_civilian_guns_per_capita_by_country
1 View attachment 1015275 United States 120.5 Americas North America 326,474,000 393,347,000 1 1,073,743 392,273,257
I'd be willing to bet that has doubled or quadrupled since then.