Legion Arquitor Bombard
"With its reinforced chassis and brutal short-range firepower, the Legion Arquitor Bombard is called upon to break the most stubborn enemy fortifications or annihilate massed troops and armour. Deployed alongside infantry squads, the Space Marines know that these artillery pieces will see them through the most ferocious of firefights."
- – GeeDubs description.
The Legion Arquitor Bombard is a new and smol artillery tank used by the SPESS MEHREEN LEGIONS of yore during the Great Crusade and Horus Heresy. These are one of the smallest Based on the Sicaran chassis but backwards in the tradition of the Minotaur variant of the Malcador Heavy Tank that can be driven by a Space Marine, seriously, just look at the size of that cockpit, that thing ain't a tank, its a tankette. Still, despite its puny size, it more than overcompensates (for people deciding it is small before seeing the actual model compared to another vehicle) its stature by carrying a big fucking Graviton gun or an array of indirect fire missiles.
Overview
With its small size, get real this this thing is actually a backward Sicaran, not a backwards Sabre Tank Hunter as That guy would have you believe; the Legion Arquitor Bombard could only mount weapons as big as it is, as such, is designed to be a close support vehicle rather than a long range artillery piece like the Whirlwind, as such the range of these weapons are cut pitifully short, especially for a dedicated artillery piece. Fortunately, the weapon that the Arquitor is armed is the aforementioned graviton beat stick, and the Spicula Rocket System... yeah they should have maybe focus tested the name of that last weapon.
The graviton-charge cannon is the bit one primary weapon of this little 4HP artillery tank, in classic FW fashion they previewed this option first before actually releasing a totally different weapon option, the horribly named Spicula Rocket System.
Rockets are used to clear infantry formations, whilst presumably the grav weapon is used to crush enemy fortifications and the occasional tank in times of heavily drawn-out sieges. Seeing as how graviton and other grav weapons are for more effective against objects that are extra THICC such as vehicles, super heavies and TEQs, blasting a graviton wave against a giant wall seems to be the next logical conclusion. Walls have to be big y'all to be truly effective, so it makes sense to use the wall's very own size and weight against it; stressing the foundations until the wall itself could no longer take the amplified weight before crumbling down like the Berlin Wall.
Unfortunately, the short range of its primary weapon options kind of makes this baby Basilisk Minotaur a bit too risk-heavy and, given how rare and expensive Grav-Weaponry are, present day Space Marine Chapters which still house these artillery pieces are quite hesitant at rolling them out in the battlefield. The vehicle is mounted with two heavy bolter sponsons as secondary weapons, but these are a last resort and they ain't gonna do much when a Dreadnought is gonna march right up to that poor little Shota of a vehicle before uttering "Ara ara!".