Thompson Center Renegade, .54 cal. flintlock rifle.  Serial 51083.  Very good condition.  26” octagonal barrel has excellent bore, open sights, barrel has 85% blue with drilled holes for scope base at breech.  Flint lock plate and hammer have excellent case coloring.  Stock hardware is excellent.  Stock has very good finish with few light handling marks.   Double set triggers and flintlock work fine.  Black powder, can ship to your door.