What was the earliest military rifle that used metal shell bullets?

The world's earliest direct-acting military pistol with metal shell bullets was invented and manufactured by German Peter Paul Mao Se. Mao Se was a famous German gunsmith. He was born in 1834 and died in 19 14. The bolt of this kind of gun invented by him won the patent of 1868 in the United States. The collaborators listed in the patent right, namely the inventor, are his brother William and an American named Samuel Norris. Mao Se's name is not only associated with many rifles, but also with many pistols and revolvers.

mauser rifle

Direct-acting military rifle, also known as Mao Se rifle. It was manufactured by Oberndorf Arsenal in 187 1 year (Mao Se is the factory owner), so it is also called 187 1 Mao Se rifle. The caliber of this rifle is 1 1mm, the barrel has spiral rifling, and it fires metal shell bullets. When shooting, the shooter controls the handle of the bolt to realize unlocking, unloading, loading and locking. The invention of Mao Se rifle is a great change in rifle history.