Just a quick question. In the description, it says psychic blades are treated as swords, except where noted. This implies that they are still counted as primitive, but it seems hard to classify a weapon composed of pure psychic energy as "primitive". Any thoughts on this?

I wouldn't treat this sword as a primitive. In the description we have that this blade is 1 molecule thin and cut through an armour with ease as it was made of cloth. So I don't see why it should have primitive quality. Because primitive weapons have a problem with penetrating modern armour and this blade not. besides later in the description you have that this blade deals d10 rending dammage +2 per point of WP bonus with penetration 2xWP bonus. There is nothing about being primitive. So I would't treat it as a primitive. I would treat it as a Force sword. In the desription of a Force sword you have that even in the hands of no psyker it counts as a mono variant of their standard primitive weapon type. This blade is made of psychic energy so it is a pure force. I would say it's a force blade as it would be force sword.

DastardlyIceHole said:

Adding the mono upgrade to a sword doesn't stop it being a sword (and a power sword is still a sword), so why should you add the primitive quality to something when you are told to treat it as a sword ?

There is no rule that says that a sword must be primitive. In fact, the mono-upgrade says that swords don't need to have it. But even if there was, the damage listed doesn't include the primitive quality, meaning that it would be an exception.

It counting as a sword only matters for skills and talents that only work with swords. Such as Blademaster.