Burnside Carbine, .54 cal. percussion breechloader.   Serial #3101.   Fifth Model. Fair condition.  Popular Civil War carbine designed by General Ambrose Burnside. 21” round barrel has pitted bore with strong rifling.  Barrel has heavily corroded finish with correct sights.  Lever, breech block and receiver have no remaining finish with spots of corrosion.  Saddle ring resent.  Stock and forearm have good original finish with few light marks.  Action and lock work fine.  Nice piece of Civil War history!  Antique, can ship to your door.