US Constitution

US Constitution doesn't allow a having standing army, hence this ridiculous notion of armed militia.

U.S. Constitution allows piracy, so it is not a serious argument.

US Constitution Article 1 Section 8

To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;

To provide and maintain a Navy;

To make Rules for the Government and Regulation of the land and naval Forces;

To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions;

To provide for organizing, arming, and disciplining, the Militia, and for governing such Part of them as may be employed in the Service of the United States, reserving to the States respectively, the Appointment of the Officers, and the Authority of training the Militia according to the discipline prescribed by Congress;

Still US Congress does this comedy with "extending" mandate of armed forces. On the one hand this may stopped USA from becoming colonial power, on the second hand for over 100 years USA had standing army.