This fine rifle appears to be the work of Cyrus Jackson of New York. He worked in several locations and was known for making fine, well-decorated rifles. His last location in 1826 until his death in 1830 was Rochester, NY. Prior to that, he worked at Morris, then Fly Creek, and New Berlin before Rochester. You will note the rifle has multiple New York details, including: patchbox design, checkering at wrist, and single trigger. Jackson liked to use eagles in his decoration, as this rifle displays. He also liked this style of New York patchbox and was known for making the major elements very thin, as on this rifle's patchbox finial. You will note his last name on the barrel inlay, as well as his initials on the top of the breech.
Cyrus had a son, Cyrus W. Jackson, who was also a gunsmith, but worked later and I do not believe he came up to this level of artistic enhancement. Further, the son almost always used his middle initial to separate himself from his father, and this gun has just two initials. Great rifle showing a lot of individuality in a controlled, attractive manner. Shelby Gallien