Stats for KOTOR Mandalorian Heavy Blaster Pistol
Easy answer is that it has the same stats as the general heavy blaster pistol found in the core rulebook.
If you wanted to make it stand out more though, there's a few different heavy blaster pistol designs found in the splats. For instance, Dangerous Covenants has one that reduces the crit rating down to 2, but can run out of ammo on 2 threat, while Fly Casual has a "superheavy" pistol that is Encumbrance 3, but also Damage 8.