Bzzzzzt! Wrong. Not according to my copy of the U.S. Constitution.
Maybe your copy is not correct?
It's not wrong at all. It's not the whole second amendment, but it's correct.
See this official government site for the "official" version from the United States Statutes at Large but on the Library of Congress site. It's listed as Art. IV, since two other amendments were proposed by Congress at the time as what is now known as the Bill of Rights.
US Constitution - 2nd Amendment Verbatim:
A well regulated Militia, being necessary for the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.