Allin prototype

One of the earliest Allin wooden models
One of the earliest known wooden prototypes

Springfield Armory NHS, US NPS

Allin was not a person to accept “good enough,” he kept experimenting with the Trapdoor concept. One version that he worked on was the center hammer lock. Here is shown the process of realizing his ideas: drawing, wood model, and complete test weapon. This was a model that did not go into production.

Wooden Model of Breech Mechanism SPAR7818

 
Wooden Trapdoor breech model

Springfield Armory NHS, US NPS

Wooden Model of Breech Mechanism SPAR7819

 
Wooden M1865 Trapdoor breech

Springfield Armory NHS, US NPS

Wooden Model of Breech Mechanism SPAR7826

 
Wooden model of center hammer Trapdoor breech model

Springfield Armory NHS, US NPS

Lock Model SPAR7829

 
Wooden center hammer Trapdoor rifle breech mounted in wooden stock

Springfield Armory NHS, US NPS

Lock in Stock Model SPAR7824

 
Completed center hammer Trapdoor rifle

Springfield Armory NHS, US NPS

Rifle SPAR40

Last updated: February 26, 2015

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