The rifle was invented long before World War I; rifled muskets were first developed in the 17th century and had limited use in the American Revolution and Napoleonic wars where they proved highly successful.
Repeating rifles were developed in the 19th century and used on a small during the American Civil War.
the rifle was invented in about the 15th century but it's kinda hard to place a name and date to it
No
U-boats.They were invented by Germany, but they didn't invent them in WW2 - They had been used prior to the FIRST World War (1850).
ross rifle
Mauser
No
no
yes
Percy LeBaron Spencer
British 303
the MAS
vengacharil chandy of kerala, india was the first user of the rifle