Hi there , this is my first of many posts I feel. I have been given a collection of guns , maybe civil war or earlier and will need some help....maybe lots since I know very little on this subject. Firstly , I have three Carbines , a Sharp serial number C30506 , next a Spencer Serial No. 45571 then a Burnside SN 11454 They all seem to be in working order ,although the bore of the Burnside is horrible....If anyone can help me with info on these I would be most grateful. Grahame