Burnside, Fifth Model Carbine manufactured by the Burnside Rifle Co., of Providence, Rhode Island 1863-1865. The Burnside Carbine was designed by Federal General Ambrose E. Burnside before the Civil War and was one of the most widely issued and successful Federal cavalry carbines. This Fifth Model carbine has the distinctive guide screw in the right side of the receiver . The carbine has a folding, two leaf, rear sight with three apertures graduated form 100, 300 and 500 yards. A cavalry sling bar and ring are mounted on the left side of the receiver. The barrel has a dull, military blue finish. The breech block, lever and receiver tangs are niter blue. The receiver, hammer, barrel band, lock plate and buttplate have a color case-hardened finish. The stock and forearm are oil-finished black walnut. The top of the receiver is roll-stamped: "BURNSIDE PATENT/MODEL OF 1864" in two lines. "CAST STEEL" is stamped on the barrel in a single line ahead of the rear sight. The lock plate is roll-stamped: "BURNSIDE RIFLE CO./PROVIDENCE=R.I." in two lines. The serial number, "18831" is stamped on the top of the receiver and breech block. The left side of the stock wrist is stamped with Ordnance sub-inspection and final inspection marks. The script initials "EPR" are stamped in a rectangle near the receiver and the script letters "RWK" are stamped in a rectangle near the side plate screw. Single letter inspection marks are stamped on most components.