Boltgun: Dice Cube to Heavy Bolter
Boltgun + Dice Cube → Heavy Bolter is the October-demo community pairing. For this weapon, choose Dice Cube as the reported companion; this is the 40k recipe, not the Age of Sigmar Boltstorm Pistol path.
Brother Luca and the base weapon
The first-survivors reveal identifies Brother Luca as an Ultramarines Intercessor created for Warhammer Survivors, starting with Boltgun. It describes Heavy Bolter as the evolved form with sustained fire. That is official announced character context; this guide does not claim a current Luca rescue route or numerical weapon stats.
Resolve the similar names before choosing
Malum Caedo is famous for the separate Boltgun game, but starts Survivors with Chainsword. Morvenn Vahl’s Fidelis evolves to Purgator Mirabilis; the generic Heavy Bolter result does not prove she needs Dice Cube.
The Boltstorm Pistol also uses Dice Cube in the current report, but belongs to Age of Sigmar and yields Typhoon Crossbow. Pick the recipe for the universe you are playing. Exact levels, Dice Cube passive stats and Heavy Bolter damage are not established here.