The 54 caliber, percussion, breech loading, single shot Merrill carbine was a popular Union carbine during the Civil War. Manufactured by H. Merrill, Baltimore, MD, approx. 14,495 of two types were delivered during the Civil War. The breech lever is unlatched by pulling back the front tabs. It is then lifted up and pulled back to expose the chamber so the paper cartridge can be loaded. The round 22 1/8"" barrel on this carbine has a fine bore with bright, strong rifling with some firing erosion toward the muzzle. The lock plate is marked forward of the hammer J.H. MERRILL BALTO. over PAT. JULY 1858 over APL. 9 MAY 21-28-61 with the serial number, 3351, at the tail. The barrel has an even plum finish and the lock shows traces of its case hardened finish. The brass band, trigger guard, patch box, and butt plate have an even aged patina. The sling bar and ring are present. The lightly sanded and refinished stock is fine with no cracks or chips and no visible cartouche. The action functions correctly. This nice first type Merrill carbine would be a fit for any Civil War collection.