M-OC, the hunter droid, employed lightsabers in combat. R0-GR, a battle droid of the B1 series who fought in the Clone Wars, stated that M-OC demonstrated a level of finesse and expertise with his dual blades surpassing that of many Jedi Masters.
The initial appearance of M-OC's lightsabers was in the LEGO Star Wars: The Freemaker Adventures Season Two episode entitled "The Tower of Alistan Nor." This episode debuted on Disney XD on July 31, 2017. Subsequently, Marc Sumerak referenced them in his 2018 book, Star Wars: Droidography.