I have an early certified copy of the Constitution with the first 12 amendments.
In this "certified" copy, Amendment II has
three commas:
(quote, page 25)
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
(unquote)
The certification reads:
(quote, page 31)
Department of State
July 20th, 1846
This edition of the Constitution & amendments has been critically compared with the originals in the Department & found to be _correct_, in _text_, _letter_ and _punctuation_. It may, therefore, be relied upon as a standard edition. ...
James Buchanan
Secretary of State.
By the Secretary,
[A.P.Tritt], Chief Clerk.
(Unquote)
Note the signature in brackets is unclear. I've entered my best guess.
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Later in the same book, in an "Analysis" section, the Second Amendment has only
one comma:
(quote, page 83)
"A well-regulated militia being necessary to the security of a free State, the right of the people to keep and bear arms shall not be infringed.......
(unquote)
Note the analysis is not "certified" by the Dept. of State.
However, the entire book was entered into the Congressional record, considered a public document (by act of Congress), "... and entitled to be franked as such."
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So, relying upon this and other expert observations, we pretty well can guarantee that the Second Amendment has three commas. Or two. Or possibly only one.
Gee! Glad I could help! (whimper)