<whoop! whoop! whoop!>
You know what that sound means. It's the Giant Robot Alert and that's what Forge World is bringing us this week. They're the Knight Moirax and there's two weapon loadouts that you can pre-order now from their webshop for your 40k armies.
From the website:
Similar in size to the Imperial Armiger, the Mechanicum Moirax is a skirmisher, using its speed to hunt ahead of larger Knights.
Standing around half the height of the most common Mechanicum Knights, they nevertheless share a lot of details with their larger cousins – the basic shape, with 2 weapon arms, hydraulically driven legs, tilting plate and a large carapace surrounding the central head of the suit. Another detail in common with those larger suits is their loadout – for their diminutive size they're incredibly powerful, specialising in ranged combat.
The Knight Moirax is armed with a volkite veuglaire and Gyges siege claw and a carapace-mounted heavy stubber, the latter of which can be replaced with a meltagun. Two distinctive faceplates are supplied in the kit (a knightly helm and a Mechanicum skull), and both weapons and legs can be attached to either side of the model, allowing for some customisation of pose.