Got to admit I do like the look of your ... rifle? I had an 1870 Trapdoor in 50-70 so figured why not and went looking for a 45-70. Found one at the LGS in pretty good shape for $300. Took it home and started to go over it. The bloody thing had been repaired(?) at the lock area, front half of the stock was all 1873, rear half was all 1863 musket, and it was set up with a couple of inches of cast off! They even bent the trigger plate! Quick trip to OGCA and worked with the folks from Trapdoors Inc and I replaced the stock and trigger plate bringing her back to her all original (in appearance anyway) glory. Now I've seen and handled guns with cast off before, but never on a trapdoor. Someone obviously pit a lot of effort into making her that way, and if it ever does pass on the original parts will go with her. She must have made somebody a real nice hunting piece at one time.