This is why most on the left needs to stay out of constitutional discussions, they have no idea what it is or what it is for, follow along and when I am done feel free to torture both logic and the language to pretend you are making a point...the infringement comes from passing a law not from the size of the purchase...if a law were passed that said we could not purchase anything smaller than 100 rounds that would be an infringement, understand? [I am not asking you if you agree, I am asking you if you understand, if you cannot answer with a "yes" then you are wasting my time]