Charles Monroe Knupp (1862-1937) was a late 19th and early 20th century gunsmith and saw miller in Somerset County, Pennsylvania. He is believed to have been trained by his uncle Jonathan Dormayer (Dunmeyer) and to have continued working as a gunsmith until shortly before his death long after breechloading rifles had become the norm. His rifles are very similar to his uncle David Dunmeyer's work, who was also a gunmaker. The lightly tapered octagonal barrel has a browned finish and traditional blade and notch sights and circles and dots around the muzzle. The single position lock is signed "C.M.K" like other known Knupp rifles and has some lined engraving. The rifle is set up to fire only after setting the double set triggers. The rifle features engraved brass mounts and a figured curly maple stock with incised scroll carving and molding.

Fine with a smooth blend of finish and brown patina on the lock and barrel, minor flash wear and pitting at the breech, attractively aged patina on the brass mounts, glossy finish on the stock with some discoloration around the tail of the lock and wrist, and generally minor overall wear. Mechanically fine.