Yes, I've accumulated a few:

1816 Harpers Ferry musket, lock marked 1823 with an arsenal conversion to percussion and rifling. Unfortunately about a foot was cut from the barrel and stock sometime before my Dad found it in the late 1940s.
1873 Trapdoor traced to an Iowa regiment raised for the Spanish American War.
1917 Eddystone. My son and I restocked it back to military configuration
1943 Inland M1 Carbine
1955 HRA Garland with an almost new 1955 barrel
Late 1970s Colt AR demil kit assembled with a new Israeli contract overrun Colt barrel.
M1917 Smith and Wesson revolver.