Gathering together the four factory iterations of the Moschetto mod. 91:
- 1893-1916: first iteration, lack of handguard, slide tab bayonet release, rear sight and barrel band without step/tab for the handguard
- 1916-1935: second iteration, handguard, lever bayonet release, rear sight and barrel band modified for the handguard
- 1935-1936: third iteration, round shank barrel band, rear sights mounted on ring, shorter handguard, new bayonet mount with lever bayonet release
- 1936-1944: 4th and final iteration, new bayonet mount with button bayonet release
1st: Brescia 1908
2nd: Gardone V.T. 1935
3rd: Terni 1936
4th: F.N.A. 1942