After seeing this project on another forum I decided to give it a shot and make one of my own (with a few deviations)
This is a standard Ruger 10/22 made to look like an old Spencer/Sharps/Springfield Trapdoor carbine
Links to my blog where you can see the whole construction of this carbine
TINCANBANDIT's Gunsmithing: The Ruger Spencer Carbine Part 1TINCANBANDIT's Gunsmithing: The Ruger Spencer Carbine Part 2TINCANBANDIT's Gunsmithing: The Ruger Spencer Carbine Part 3