The first Allin Conversion trapdoor rifle, converting Civil War muzzleloaders to breach-loading by adding a hinged loading door machined into the barrel. The 50-70 Government was the first US Army centerfire cartridge. Type: Rifle Action: Single-Shot Caliber: 50-70 Govt Capacity: 1 Year introduced: 1866, USA Weight: 8.75 oz Overall length: 52.5" Status: Discontinued Military use: Yes Intended use: Military Service