Most-produced Union infantry rifle of the Civil War. .58 caliber Minié ball. Percussion cap muzzleloader. Over 1 million produced across multiple contractors. Standard Union infantry arm. Type: Rifle Action: Single-Shot Caliber: 58 Caliber Capacity: 1 Year introduced: 1861, USA Weight: 130 oz Overall length: 56" Status: Discontinued Military use: Yes Intended use: Military, Collector