Manufactured by Richardson & Overman of Philadelphia, from 1861 to 1865, with a total production of about 17,700 percussion, and approximately 5,000 chambered for the 56-52 Spencer round. (Production quantities vary from historian to historian)
Barrel is 22 1/4 inches long and the overall length is 39 1/4 inches.Gallager boasted that his design would facilitate the easy removal of the spent casing from the breech, the extraction was the major defect of his weapon and the weapon was not well liked by the troopers due to this problem. A major fault of these carbines was the absence of a suitable extractor. The case had to be extracted with knife or some other sharp pointed instrument.
When the trigger guard lever is lowered, the barrel slides out from the frame and tips downward to receive the cartridge.
These carbines saw extended service with Union cavalry during the Civil War and though
The pictured carbine is the standard percussion model which fired an unprimed .50 caliber cartridge with a brass foil and paper-wrapped case or an all-brass case. The rounded, perforated base of the Gallager cartridge looks like a doughnut. Ignition was provided by a percussion cap.
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