It may depend on what is classified as an "Astartes weapon." Does it need to have "Astartes" in the title? The books never seem to say. We have Astartes Storm bolters, Astartes incinerators, Astartes psilencers, and....Nemesis Force Weapons. No "Astartes" in the title; are they exempt? Or do we assume that they must fall in to that category because of where their rules entries are found?

By the way, what does the book say about wrist-mounted storm bolters? In DW mounting anything bigger than a pistol is forbidden.....

Storm Bolter mounting seems to be the standard fare for Grey Knight power armor and Malleus Terminator Armor.

What, if anything, has been included in the book of terms of background packages and/or home worlds and the like?

Background Packages

Corporeal Sanctification - They basically engrave your flesh and bones with warding glyphs and you gain some decent immunities and random bonuses.

Daemonic Vanquisher - Gain the Forbidden Lore (Daemonology) Skill & Hatred (Daemons) talents

Fate-Eater - You stand outside the God-Emperor's grand scheme of things. When you kill a being with Fate Points you steal it's fate.

Host Bound - You were meant to serve as a host for a daemon, but didn't make it that far. Gain resistances against daemons, and psychic abilities, but you're a lightning rod for Perils of the Warp should some dam psyker set it off.

No alternate world packages unfortunately.

Quartermus said:

I think Mjoellnir was refering to the weapon upgrade "wrist mounting", which is different from "mounted weapons".

Are you sure you can wrist mount a Storm Bolter, or is it "hand mounted", like in normal Termi Armor?

Don't have the book now (it should arrive...No, it should have arrived two days ago. I'm not going crazy over it, see?), but here're my two cents

Well the Grey Knight wrist mount is a definite YES to storm bolters. I could be wrong about Malleus terminator armor as it says it has a sturdy wrist mount that adds the auto-stabilised trait to any ranged weapon mounted on it then follows with a short list of "Terminator Compatible Weapons".

As for specifically "wrist-mounted" storm bolters, I haven't seen anything.

Does this rulebook have a generic template (compiled stats) for a Grey Knight NPC?
By reading the table of contents it doesn’t look like this book has it but maybe it escaped me.