Ignis-Pattern Flame Weapons

The Ignis-Pattern are a mechanicum-approved variant in design applicable to all infantry Flame weapons. As vehicles use large internal tanks of promethium the variant does not apply for their weaponry. Ignis-pattern flamers are commonly found in the armories of the Obsidian Wyrms which conceived the design as well as in the Deathwatch armories in Jericho. However, they may also be more rarely found in the hands of other Chapters who fought by their side on the fields of battle.

The Primary difference between Ignis-pattern variants and their conventional counterparts is the method employed to fuel the weapons. While most flamers are fed by a single canister inserted below the chamber, Ignis weapons features two relatively larger twin canisters laid horizontally, parallel to the barrel, and feeding the weapon from the sides. The explicitely designed front side of the canisters is reinforced more firmly than standard canister to protect it more against shrapnel or light arms and despite the larger amount of promethium this safeguard along with clever design placement makes it no more vulnerable than a conventionally-placed under-slung canister. Individual Ignis Hand Flamer canisters carry 33% more fuel than usual.

As would be expected, these modifications allow for lighter flamers to carry a far larger amount of ammunition and be able to make use of it more liberally, reducing the amount of times one needs to reload in a firefight. The exception to this is Heavy Flamers, which normally use a dedicated fuel bacpack. An Ignis-pattern features four side-canisters and a lesser overall ammunition capacity, but it allows it to be used without a canister backpack. This allows the wielder to either carry the standard Astartes backpack, thus being able to operate in toxic or vaccum environment where the oxygen recycling of the standard backpack would be necessary; or a jump pack, allowing for unexpected shock strikes.

Ignis-pattern flame weaponry are also used in the making of combi-weapons by the Obsidian Wyrms Techmarines; especially the extremely rare Strategium Apex constructs, which makes use of side-fed Hand Flamer canisters rather than the usual integrated one-use cartridges