It is nonsensical to think that the government would right a law giving itself permission to provide it's army with weapons -- armed men are the base definition of an army. Governments don't have "rights" in any case -- "rights" are the domain of individuals only. Governments have "powers".
The Bill of Rights is, by it's very definition, a list of individual human rights -- structurally and textually, it is inconsistent to assume a collective right would be placed in such a list. Review the judgements by Texas federal district court judge Sam Cummins in the recent U.S. vs. Emerson case, as well as the following judgement by the Texas appeals court which supports Cummins' original decision. The term of art "The People" in the 2nd Amendment means exactly what "The People" means in the 1st, 4th, 9th and 10th amendments -- each individual U.S. citizen.