The Springfield Armory Trapdoor Model 1873 is a usa-made single-shot rifle chambered in .45-70 Government, introduced in 1873. Primary use: hunting, target. Type: Rifle Action: Single-Shot Caliber: .45-70 Government Capacity: 1 Year introduced: 1873, USA Weight: 128 oz Overall length: 44" Status: Discontinued Military use: Yes Intended use: hunting, target