Baton rounds do no DMG, but always possess the STN modifier (inflicts Stunned).
Baton rounds can be found in a number of firearms; rifles, submachineguns, shotguns and purpose-built launchers, the latter of which this article refers to (37mm and 40mm launchers). Said weapons later developed into a long line of devices known as grenade launchers. They are made of soft materials such as rubber, foam or wood and are meant to act as less-lethal ammunition.