Following the Civil War the U.S. Government decided to convert many percussion military arms to metallic cartridge. Approximately 1,086 Model 1859, 1863, and 1865 rifles were converted to 50-70 CF and three groove lined barrels. All of these metallic conversions were refurbished at the arsenal at the time of conversion. The top of the barrel is marked "NEW MODEL 1863" at the breech. The barrel is equipped with a brass blade front sight and Lawrence patent marked folding leaf rear sight graduated to 800 yards. The lock is marked above the hammer "R.S. LAWRENCE PAT. / APRIL 12th 1859", behind the hammer "C. SHARPS PAT. / OCT. 8th 1848" and on the left side of the receiver is marked "C.SHARPS PAT. / SEPT. 12th 1859" and with the letter "M" at the front. The serial number appears on the upper tang with the "C," prefix. The rifle is mounted with a full length forearm secured by three barrel bands with a sling swivel on the center band, iron end cap and the bottom at the breech is stamped "C.B.G.". The stock has three crisp boxed inspector and sub-inspectors cartouches on the left wrist, a "DFC" ribbon cartouche in the center of the left side and a small three letter stamp on the comb directly ahead of the buttplate tang. Casehardened iron patch box and buttplate with a small "M" marked on the buttplate tang.

Arsenal refurbished with 98% blue finish remaining on the barrel. The lock and hammer retain almost all of the case colors, while the remaining metal surfaces retain most of the case colors (fading a bit in areas), with areas of smooth gray. The upper tang has been non-professionally repaired and welded at the upper screw. With the exception of a few minor gouges and dents directly behind the middle barrel band, there are some overall scattered minor dings and dents. The markings are clear. The action is excellent.