The Relby-v10 micro grenade launcher, alternatively known as the Relby-v10 mortar gun or Relby V-10 Grenade Launcher, represented a combined blaster rifle and grenade launcher weapon system. Noted users included the Trandoshan bounty hunter Bossk, as well as his father, Cradossk. Beyond Bossk's well-known utilization, select sharpshooters within both the Rebel Alliance and the Galactic Empire also employed the Relby-v10. Functionally, the Relby-v10 could be switched between launching micro-grenades and firing blaster projectiles. During the incident on Nevarro, a bounty hunter made use of a Relby-v10. Din Djarin possessed a Relby-v10 in his collection of arms, which he then lent to Omera while on Sorgan.
This mortar gun, known as the Relby-v10, was a simple yet destructive weapon. The weapon was relatively light. It offered significant combat effectiveness, boasting both respectable accuracy and an operational range extending to 200 meters. Death Watch Warriors, which included a Mandalorian super commando, wielded a weapon with a similar appearance.