The meltagun and multimelta(also known as 'cookers' or 'vape guns'), as well as the grenade-like meltabomb, are formidable weapons. They have a short range but are very powerful; they are even more powerful the closer they are to their target. A [meltagun]] works by forcing a pyrum petrol fuel mix into a sub-molecular state (a miniature fusion reaction), and then projecting it from the barrel as a blast of incredible heat. The grenade variant's fuel has already been hypercondensed and is no less devastating. These are highly useful against heavily armored units, as they melt the target from within. Multimeltas resemble two meltaguns fused together. They have a longer effective range than a normal melta.
The rarer pistol version is known as an Inferno pistol and can vaporise foes of any kind with usual ease. Lord Dante, Chapter Master of the Blood Angels is the most notable of the few users of the Inferno pistol. Inferno pistols are also used by Ordo Hereticus and by their militant arm, the Sisters of Battle.