Curious about firearms that could fit well in a "steampunk/victorian" setting.

[Diego Wolfwood]

Originally Posted by Excalibur

And since it's steampunk, you can also dress up any gun really to fit the steampunk theme

True, but I'm looking for realistic examples (Nothing dressed up) and one thing I'm looking for is rifles with old magnifying devices/scopes. If anyone here has seen Steamboy, there was a rifle with an interesting magnification system featured in one scene, has anything like that ever actually existed?