- Warning Spoilers through Straits of Hell.
Trapdoor Springfield that the Allin/Silva was patterned after.
The Allin/Silva rifle is a .50/80 cartridge shooting single shot breach loader. Similar to the Trapdoor Springfield see https://en.wikipedia.org/wiki/Springfield_Model_1873
Trapdoor open on a model 1888 Springfield. Photo by Hmaag
The breach block is opened and the metallic cartridge inserted to load.
Some 20 gauge smooth bore shotguns were made from muskets.
Taylor Anderson sent a message with the following data:
"Tech Data suitable for Wiki: As of Devil’s Due, the “standard” infantry rifle of the United Homes and increasingly, the Grand Alliance (with the exception of the Republic of Real People) is the Allin-Silva “trapdoor” conversion. It has a 36″ barrel with a bore diameter of .50, land to land, and .514 groove to groove. Rate of twist is 1-48″. It fires a .50-80 caliber straight(very slightly tapered)cartridge, loaded with a 450grn medium-soft alloy lead bullet with large grease grooves filled with a high temperature natural wax cut with grikakka oil. The bullet alloys vary, but achieve a Brinell hardness @ 10. Powder charge is 80grns of medium fine (roughly 3FFFG equivalent) charcoal, potassium nitrate, and sulfur gunpowder. Muzzle velocity averages 1,500 FPS (checked on a LabRadar Doppler radar chronograph)."