In the USA the enormous number of war surplus muzzle-loaders produced the Allin conversion Springfield in 1866, with a trap-door loading mechanism of the British gun, the firing mechanism was very similar to the Prussian gun.
The firing mechanism was very similar to the Prussian gun. This was in the USA the enormous number of war surplus muzzle. Loaders produced the Allin conversion Springfield in 1866. This was with a trap-door loading mechanism of the British gun.