Rifle; .54 caliber breech loading carbine; maker's marks read "JOSLYN FIREARMS CO/STONINGTON, CONN./1864"; The found rifled barrel, hinged breech block, lockplate, hammer, lanyard ring, stock band, trigger guard and belt plate are made of steel, The 3/4 length stock is made of medium stained walnut. Stamped on the lockplate in three lines :Joslyn Firearms Company/Stonington, Conn./1864. On top of breech is the serial number 4010. It has a two leaf rear sight. The hole in the center of the breech block is to allow the gases to escape. This is a single shot carbine.
During the Civil War, the Government purchased 11, 261 of these carbines for $282,586. It also bought 515,416 Joslyn cartridges for $12,935.27. The test of 1866 showed that these carbines could be fired at the rate of 8 shots per minute.
One of several private manufacturers, the Joslyn Firearms Company, developed a successful breech-loading type rifle. This weapon featured a rifled bore that imparted spin to the bullet, giving it greater accuracy and an effective range between 150-200 yards (compared to 80 for smooth bore weapons.) The rifle revolutionized warfare by allowing defensive forces to shoot attacking armies from greater distances, giving rise to trench-style warfare.