Not only cap and ball. The machine gun was being made in 1580 and 1590 in Nuremberg Germany and further developed in the 1600 1700s and 1800s in other countries.
The cap and ball agruement is not the whole story.
While this is all true, the point of my statement was that, regardless of what type of weapons were available at the time, it has absolutely nothing to do with the 2A.
