Looks like a cut down military musket that was turned into a hunting shotgun/fowler. Hence the shortened stock and ramrod underneath the barrel.
Looks like a sling attachment point just ahead of the trigger guard. Which would not be present on an original civilian sporting arm.
The fancy scroll/metalwork behind the trigger guard is odd though. More 18th century than 19th century.
Looks like you have what used to be a mid 19th century Brunswick Rifle.
You're missing the patch box/inletting in the butt stock though.
This also explains the notch in the top of your barrel ahead of the chamber. Missing rear sight. And those rectangular notches in the stock are for small wedges that secure the stock to the barrel. Your lower barrel band looks like it could have come off of any 18th/19th century military arm. The whole things looks cobbled together. As was mentioned previously.....Bubba.
I present to myself the MDS Sherlock Holmes award of the day.
View attachment 216864
I agree, "Bubba" has been around a long time.
Is it rifled?
Does the bayonet actually fit?
Looks like you have what used to be a mid 19th century Brunswick Rifle.
You're missing the patch box/inletting in the butt stock though.
This also explains the notch in the top of your barrel ahead of the chamber. Missing rear sight. And those rectangular notches in the stock are for small wedges that secure the stock to the barrel. Your lower barrel band looks like it could have come off of any 18th/19th century military arm. The whole things looks cobbled together. As was mentioned previously.....Bubba.
I present to myself the MDS Sherlock Holmes award of the day.
View attachment 216864
Does it still have the Brunswick twist barrel or was that Bubba'd out?
Have you stuck the ramrod all the way down to see if it reaches the nipple? With old BP muzzle loaders that is one of the first things to check because if there is still a load in the barrel it could be dangerous because black powder can still go off no matter how old.