ammo is addressed in the judicial branch of our government and again in our states and localities. the general drift, is that its not provided for, but its outlined to be legal possessions undera limited amount, otherwise its considered an arsenal. The general fear is someone can hold up and hold out for a time with adequate ammo i guess.
over a certain amount, is illegal.
A normal clip in an ar-15 is acceptable, but a banana clip is outlawed.
the rifles, can only be modified in certain ways, before they too become assault oriented.
I think the founding fathers didn't care, seeing how we'd just melt down our silverware to make musket balls anyway.
It is implied.
You don't need ammo for a pair of bear arms, silly goose.
How else could we shoot the bears?