Geoff, check your history, repeating arms were very very scarce prior to 1861. Flintlocks were still in fashion as late as 20 years before the War of Northern Agression. I would imagine a smoothbore fouling piece would not have been out of bounds in some cases but a single shot cap lock rifle was about as modern as you got in the years leading up to 1861.
That was the point of my post. No such repeating arms really existed back then. The "if they were available" was a pure hypothetical.
Actualy repeating arms did exist back then. They were just too delicate and complex for the average recruited individual because they had to be made to close tolerances and required more thorough maintainence.
You are probably unaware of them because they were airguns with a butt stock resrvoir. The energy levels on them were on par with most long arms of the day, yet could fire around 20-30 shots as repeaters, and the reservoir could be detached and replaced with another previously charged and carried.
Many individual examples existed custom made around the time of the Declaration of Independence, but one of the first to go into mass production did not occur until a few years after the revolutionary war. Yet anyone with ties to the nobility would be well aware of them.
These mass produced examples would become the main armament of the Austrian army. The were the Girandoni Air Rifle, or Wind Rifle, created 1779-1780.
http://www.beemans.net/Austrian airguns.htm
As I said while these may have been some of the first mass produced ones, many custom ones existed prior, and were widely fielded by nobility.
In fact they were so feared that many considered them cowardly assassin's weapons (including Napoleon) because they did not leave the telltale black powder smoke to tell where the shots were coming from, and could fire so many shots at once.
Anyone captured with such a weapon was usualy killed because of this.
Some of the german (Hessian) mercanaries that came over to fight in the War of Independence used similar airguns, though they were built on an individual basis as the Girandoni did not yet exist.
Most royalty used airguns with as much power as firearms because they could afford them and the more sophisticated maintainence they required. Firearms were simple and rugged, powder goes in, is sparked, and fires. They could be to loose tolerances and had few parts. They were the weapon of the masses.
Fine airguns were the weapons of the nobility and those who could afford the best quality. This is the way it was until cartridge guns were invented.
Airguns were prefered by nobility for hunting and personal use as far back as the 1500s because they usualy had far more capability than powder guns of the day.
Similar airguns were also used by some in the American Civil War, especialy by "snipers." Lewis & Clark of course used one as well over 50 years before the American Civil War during thier journey.
Repeating airguns fired projectiles with as much energy as the muskets of the day, were multi shot repeaters, and would have been known to the founding fathers, many of whom had close ties with the nobility that often used them hunting.
This is long before there was a legal difference between airguns and powder guns. They were all considered arms.