[tomaoneill]

s

 

[Buffalochip]

Not military, lock marking isn't necessarily tied to gunsmith--may indicate the lock maker; octagon to round barrel indicates it is probably a fowler (shotgun) as does the absence of sights. Can't tell from the pics if the forestock has been shortened. It appears to be missing a thimble. Dates from mid to late 19th century.

 

[tomaoneill]

.

 

[Jim K]

Even in good shape, anonymous percussion shotguns and rifles usually sell for $200-400. By that period (c. 1850) few gunsmiths were actually making guns. Most were buying factory made parts from distributors and assembling them, sometimes with a few custom touches.

Jim