Dick was correct, the rifle was made between 1840 - 1890 in Jamestown, N.C. There were as many as 85 gunsmiths who worked in this school during this period. They were the largest longrifle school in the South. I have only found signed rifles by 38 of those men. I believe the others mostly worked as farmers nine months a year and made rifles during the winter to provide extra income. if the rifle is not signed on the barrel, there is no way to know which gunsmith in this school made it.
I have written a book, "The Longrifle Makers of Guilford County" about this group of men if you are interested.
These men did not make their own locks and imported them from Pennsylvania except during the Civil War period. Leman and Golcher are the two most common. After the railroad was completed to Jamestown, they also imported their rifle barrels.
Michael