Harper's Ferry Armory's production of the first standardized US military musket, based on the French Charleville M1777. Harper's Ferry and Springfield Armory shared production. The first musket manufactured by the fledgling US government for its own army. Type: Rifle Action: Flintlock Caliber: .69 Flintlock Capacity: 1 Year introduced: 1795, USA Weight: 104 oz Overall length: 43.5" Status: Discontinued Military use: Yes Intended use: military