This gun had a paper cartrige with a primer attached to back of the bullet inside the cartrige. It used a needle like firing pin to punch through the paper and set off the primer. Kind of a halfway between muzzle loaders and modern cartrige guns.
Prussians killed many Austrians with those in 1866, A turning point of sorts in the 19thcentury.
Only for years later, in 1870 the French Army fielded a superior bolt action rifle (but lost anyway)