even before our constitution every settler was REQUIRED to have at least TWO muskets, a bag of powder, and so many pounds of ball shot. It was expected that every able-bodied male of 14 years old or older (at the time that was enough to be considered a man enough to fight) to participate in the defense of your town, state, or property from invaders.
Even field artillery was considered a 2nd amendment issue
United States v. Cruikshank, 92 U.S. 542 (1876). This was the first case in which the Supreme Court had the opportunity to interpret the Second Amendment. The Court recognized that the right of the people to keep and bear arms was a right which existed prior to the Constitution when it stated that such a right "is not a right granted by the Constitution...[n]either is it in any manner dependent upon that instrument for its existence." The indictment in Cruikshank charged, inter alia, a conspiracy by Klansmen to prevent blacks from exercising their civil rights, including the bearing of arms for lawful purposes. The Court held, however, that because the right to keep and bear arms existed independent of the Constitution, and the Second Amendment guaranteed only that the right shall not be infringed by Congress, the federal government had no power to punish a violation of the right by a private individual; rather, citizens had "to look for their protection against any violation by their fellow-citizens" of their right to keep and bear arms to the police power of the state.
Presser v. Illinois, 116 U.S. 252 (1886). Although the Supreme Court affirmed the holding in Cruikshank that the Second Amendment, standing alone, applied only to action by the federal government, it nonetheless found the states without power to infringe upon the right to keep and bear arms, holding that "the States cannot, even laying the constitutional provision in question out of view, prohibit the people from keeping and bearing arms, as so to deprive the United States of their rightful resource for maintaining the public security and disable the people from performing their duty to the general government."
U.S. v. Miller, 307 U.S. 174 (1939). This is the only case in which the Supreme Court has had the opportunity to apply the Second Amendment to a federal firearms statute. The Court, however, carefully avoided making an unconditional decision regarding the statute's constitutionality; it instead devised a test by which to measure the constitutionality of statutes relating to firearms and remanded the case to the trial court for an evidentiary hearing (the trial court had held that Section 11 of the National Firearms Act was unconstitutional). The Court remanded to the case because it had concluded that:
** In the absence of any evidence tending to show that possession or use of a "shotgun having a barrel of less than eighteen inches in length" at this time has some reasonable relationship to the preservation or efficiency of a well regulated militia, we cannot say that the Second Amendment guarantees the right to keep and bear such an instrument. Certainly it is not within judicial notice that this weapon is any part of the ordinary military equipment or that its use could contribute to the common defense.
Thus, for the keeping and bearing of a firearm to be constitutionally protected, the firearm should be a militia-type arm