Many gun advocates consider the 2A absolute- the NRA certainly did. One politician on a Jon Steward interview said it was absolute because of "shall not be infringed" but when challenged on putting voting restrictions into place essentially claimed we could because there is not "shall not be infringed" when voting rights are mentioned in the constitution.
Since there were literally no restrictions on firearms in the colonial period, the SCOTUS ruling using the specious "historicism" standard, there can be no restrictions now effectively makes the 2A absolute.
The purpose of the 2A was NOT to restrict the federal govt on individuals, it was to protect southern states ability to maintain slave patrols.
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