So, I am interested in the Armageddon warzone as something of a personal project. One of the important players in that conflict is the Forge world Voss Prime, closest such world to Armageddon. Voss Prime is a world with enviable production output but below-average quality of plasma weaponry, and is one of the largest Forge worlds in the Imperium. It's titan legion also deployed en-masse to Armageddon (Legio Invigilata).
Now, I'd like some Imperial Guard units equipped with gear commonly produced on Voss. Known examples include a variant of the Lightning fighter, some autopistol designs, and Voss produced large numbers of Malcadors during the Great Crusade. The folding-stock pattern of lascarbine used by the Steel Legion is the Voss pattern. You might expect above-average numbers of these items in the Armageddon warzone.
However, there is a problem...
Voss is apparently an entirely separate Forge world to Voss Prime,
also located within the Segmentum Solar, albeit closer to Terra itself. It is highly unclear, to me, which Forge world is referred to when equipment is described as "Voss pattern"- I have not personally encountered any references to "Voss Prime pattern" equipment.
Given the location of Voss matches the location given in the Horus Heresy maps, probably all the Great Crusade and Horus Heresy era references refer to the world close to Terra. This does make sense as Voss seems to have been brought into the Imperium very early during the Great Crusade and played a large role in supplying war materiel in those early years. In addition, it is closs to Cthonia, for which Voss had exclusive rights over mined output.
This is a Horus Heresy era map:
However, the Voss pattern lasgun is almost certainly from Voss Prime given its use by Armageddon forces.
The other gear is much less clear to me.
Honestly, I think this was probably a lore mistake made by
GW around 7th edition which they have run with since, but it is very confusing. There are no references to both worlds being distinct entities until the 7th edition Skitarii codex. It seems weird to me that Voss Prime would go from being a non-entity during the Horus Heresy (not shown on maps) to one of the most productive worlds in the Imperium by the 41st millennium, but it is plausible. Another plausible option is that Voss Prime was founded by loyalist refugees from Voss during the Horus Heresy, when Voss sided with Horus, or otherwise began as a satellite Forge world of Voss.
What are people's thoughts on Voss pattern gear?