Age of Being Legal in USA!!I have always struggled with the legal age of consuming alcohol in USA being 21 but you can.purchase and posses weapons that are restricted in Canada at age 18 in USA. Legal age to smoke pot in USA states who have legalized it is 21. But you can.purchase a firearm in USA at 18!! Something doesn't add up!! What the f__k is wrong with the federal.politicians in USA. And we think Russia is f_ _ ked!! Congress men and women, Senate Men and Women better wake the f_ _ k up in the great USA.