The U.S. Model 1847 Artillery Musketoon socket bayonet is a shortened variant of the standard U.S. socket bayonets (primarily based on M1835/M1842 patterns) adapted for the compact .69-caliber smooth bore musketoon. The blade is typically 15 to 15.5 inches long. It features a fullered or plain design with scalloped or tapered shoulders, depending on the original donor bayonet and modification period. Ricasso usually marked "U.S.” The socket is approximately 2.625 inches long, with a bore sized to fit the musketoon’s muzzle (around .845 inches). It includes a standard mortise (zigzag or L-shaped slot) for attachment to the bayonet stud/lug under the barrel near the muzzle. A distinguishing trait in some examples is a rolled or rounded front edge of the socket. These bayonets were not originally produced in large numbers specifically for the M1847 but were created by shortening existing M1835/42 socket bayonets during 1858–59 alterations at Springfield Armory. They enabled artillery crews to mount a bayonet for close-quarters defense while protecting gun positions. The blade has an overall dark patina with surface rust, having never been cleaned. The blade has a slight bend when viewed from the side.