This rifle was manufactured in 1843 by Henry Deringer of pocket pistol fame. Reportedly, 13,000 of these rifles were manufactured by Henry Deringer between 1817 and the early 1840s out of a total of approximately 38,200 manufactured by various contractors. These arms are among the first widely issued rifled firearms used by any military and saw use in the Seminole Wars, Mexican-American War and Civil War. Blade and notch sights, "US/DERINGER/PHILA" marked center of lock with restamped "1843" date at the tail, "MS" (State of Massachusetts) marked on top of the breech along with "US/AH/P", "MS" is repeated on top of the stock wrist, an oval script inspection cartouche stamped on the left stock flat.

Very good as reconverted to flintlock configuration, retains 70% original brown finish on the barrel with some thinning, the barrel tang cleaned to mostly a bright appearance, mostly gray patina on the lock with strong traces of casehardening visible at some of the edges and on the frizzen, and scattered light to mild freckling, with defined barrel markings. Stock is also very good as lightly sanded and re-oiled, with some light scratches and dents, and a visible cartouche. Mechanically fine.