The second Act, passed May 8, 1792, provided for the organization of the state militias. It conscripted every "free able-bodied white male citizen" between the ages of 18 and 45 into a local militia company overseen by the state. Militia members were to arm themselves with a musket, bayonet and belt, two spare flints, a cartridge box with 24 bullets, and a knapsack. Men owning rifles were required to provide a powder horn, 1/4 pound of gun powder, 20 rifle balls, a shooting pouch, and a knapsack. Some occupations were exempt, such as congressmen, stagecoach drivers, and ferryboatmen. Otherwise, men were required to report for training twice a year, usually in the Spring and Fall.
So... can you explain how congress passing a law requiring people to buy this equipment is different from passing a law requiring people to buy insurance? Why is one constitutional and the other not?