Let us know how it does.

The gun is relatively new, my guess as to age is about 30 or 40 years old. The only part with any age to it is the barrel which is from the third quarter of the 19th Century and as suggested above it appears to have been made from a breech loading arm. The barrel band may also date back that far. The lock and it's side plate date from the 1970s as does the trigger guard. The butt plate was made at the time the gun was built and is well done but not historically correct in it's construction, butt plates are usually cast. The stock is a little course but shows good effort by an inexperienced builder.

All the above being said, it may turn out to shoot pretty well after you have found the proper patch and ball combination as well as the best powder charge. Remember to start low and work your way up slowly and carefully; unless the breech plug is pulled to check the threads, you have no way of knowing if it is properly done, it may be best to have a black powder experienced gunsmith pull it to check it first.