The 9mm Glisenti is an Italian pistol and submachine gun cartridge.

[3] The Medusa M47 revolver can also fire 9mm Glisenti ammunition along with many other .38 and 9 mm cartridges.

However, the powder charge of the 9mm Glisenti cartridge is reduced compared to a typical 9×19mm cartridge, making it significantly less powerful, as it is also meant to be used in blowback pistols, which are easier and less expensive to manufacture than locked breech firearms.

This means that 9mm Glisenti cartridges will chamber and fire in 9×19mm firearms, at the risk of not cycling properly and causing malfunctions, but it also means that 9×19mm cartridges will chamber and fire in 9mm Glisenti, presenting a significant risk of catastrophic failure to the firearm, and a risk of injury to the shooter.

The cartridge is now obsolete, but Fiocchi Munizioni occasionally produces batches.