WW Service Rifles: Length of Service

[maple_leaf_eh]

The longlived models that come to mind for 1914-1918 and 1939-45 combatants:

Mauser 98 and K98
Mannlicher M1895
Mosin Nagant
Springfield
Model 1917
Pattern 1914
Ross
No.1, including Australian production
No.4 - - edited technically introduced late 1930s but developed from the No.1
Carcano (several models)

Beyond VE-Day, the list of still serving rifles would probably go down to:

Mausers
MNs
No.1 and
No.4

because many armies issued bolt actions to regular troops until the 1950s. Canada only retired the No.4s issued to the Rangers within the past few years. Your question is of course with almost limitless correct answers too.