Why Commas are Important: It is important to use the proper Second Amendment because it is clearly and flawlessly written in its original form. Also, the function of the words, "a well regulated militia being necessary to the security of a free state," are readily discerned when the proper punctuation is used. On the other hand, the gratuitous addition of commas serve only to render the sentence grammatically incorrect and unnecessarily ambiguous.
After numerous revisions, the House voted on September 21 1789 to accept the changes made by the Senate, however the Amendment as finally entered into the House journal contained the additional words "necessary to":
"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."
On December 15, 1791, the Virginia legislature ratified the Bill of Rights, rounding out the requisite three-fourths of the states needed to make the Amendments part of the Constitution.
Now, with regard to the "commas" question in the Second Amendment....
(from wikipedia, but there are other sources as well)
There is some question as to whether the Second Amendment contains a comma after the word "militia", and a parallel debate as to whether the presence or lack of this comma influences the overall meaning of the Amendment.
Both the U.S. Senate Journal and the Annals of Congress show the final version of the Second Amendment as not containing this comma. On September 25, 1789, the completed Bill of Rights was written to parchment by a House scribe. In this version, now held by the National Archives, the comma was inserted. All other surviving original texts of the Bill of Rights, including the copies sent to the states for ratification, do not contain the comma.
Comparing versions of this and other Amendments as officially enrolled in the journals, as they were progressively modified and sent between chambers, shows that scribes of the era took liberty with the capitalization and punctuation of text they wrote.
The U.S. Government is inconsistent in the use of the comma in publications. The Statutes at Large (the official permanent record of all laws enacted) does not include the comma . The Government Printing Office (GPO) has produced versions both with and without this comma.
So, flame on, argue, debate, enlighten, but the bottom line is this... there is only ONE comma in the Second Amendment, not three, or four, but one.