the Militia Act of 1792


Section 1. Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That each and every free able-bodied white male citizen of the respective states, resident therein, who is or shall be of the age of eighteen years, and under the age of forty-five years (except as is herein after excepted) shall severally and respectively be enrolled in the militia by the captain or commanding officer of the company, within whose bounds such citizen shall reside, and that within twelve months after the passing of this act. And it shall at all times hereafter be the duty of every such captain or commanding officer of a company to enrol every such citizen, as aforesaid, and also those who shall, from time to time, arrive at the age of eighteen years, or being of the age of eighteen years and under the age of forty-five years (except as before excepted) shall come to reside within his bounds; and shall without delay notify such citizen of the said enrolment, by a proper non-commissioned officer of the company, by whom such notice may be proved. That every citizen so enrolled and notified, shall, within six months thereafter, provide himself with a good musket or firelock, a sufficient bayonet and belt, two spare flints, and a knapsack, a pouch with a box therein to contain not less than twenty-four cartridges, suited to the bore of his musket or firelock, each cartridge to contain a proper quantity of powder and ball: or with a good rifle, knapsack, shot-pouch and powder-horn, twenty balls suited to the bore of his rifle, and a quarter of a pound of powder; and shall appear, so armed, accoutred and provided, when called out to exercise, or into service, except, that when called out on company days to exercise only, he may appear without a knapsack. That the commissioned officers shall severally be armed with a sword or hanger and espontoon, and that from and after five years from the passing of this act, all muskets for arming the militia as herein required, shall be of bores sufficient for balls of the eighteenth part of a pound. And every citizen so enrolled, and providing himself with the arms, ammunition and accoutrements required as aforesaid, shall hold the same exempted from all suits, distresses, executions or sales, for debt or for the payment of taxes.
It was signed into law by George Washington. I think it should be updated to include any person of color or gender, but given the times, there was little or no discussion about this particular requirement, by the government, of its citizens.

I would think that the NRA would have to issue extra doses of saltpetre to every member over the thought of this becoming law. Alas, repealed in 1795.