Just about every answer above is correct in one context or another.
Colt revolvers were there, even the Single Action Army. But let's not forget Merwin Hulberts, Remingtons, Smith and Wesson. There were guns out there the names of which are forgotten today. A good book about GUNS OF THE OLD WEST would be enormously helpful.
Punch it into Amazon.Com search engine.
In terms of what is available on the repro market, there are various front stuffer rifles. In handguns, various single shot by Pedersoli. Uberti and Pietta make nice revolvers. The Colt 1848/9 was a small .31 caliber that was enormous during the gold rush. Uberti makes a few variations. Also, percussion revolvers as well as cartridge revolvers are available, Colt, Remington.
Unfortunatly, lesser known ones arenot, even though they were there.
The Henry rifle, it's descendant the 1866, the 1873, 1876....they are made by Uberti. I know of 2 companies making 1886.
If you want unusual ones, Colt made a pump rifle called "Lightning" in small numbers and a lever action called the Colt-Burgess 1883, also in small numbers, but Uberti makes them.
It's all up to you, what you want and can afford.