Article I Section 8 provides that Congress has the power to build: "...... Forts, Magazines, Arsenals ......."
Bet you didn't know that.
Just so you don't think there's some funny business going on when I demand my weapons from the arsenal rather than Billybob's Gun Shop.
Did you really just pull that out of your ass? Or do you really not know the difference between citizens Rights and a standing army?
Shall not be infringed. Period.