The first rifle formally adopted by the US Army. Half-stock design, 33-inch barrel, .54 caliber — shorter and lighter than contemporary muskets. Lewis and Clark carried these on their expedition to the Pacific. Meriwether Lewis personally oversaw procurement at Harper's Ferry. Type: Rifle Action: Flintlock Caliber: .54 cal Capacity: 1 Year introduced: 1803, USA Weight: 104 oz Overall length: 43.5" Status: Discontinued Military use: Yes Intended use: military, hunting