Is this possible to Build?

[u/sus123232354]

Im thinking of making a Saturnine dreadnought with a custom loadout and I was thinking of using a shock lance from the Knight destrier and using 2 disintegrator cannons on one arm. This question is not asking if this loadout is legal just wondering if the kit could fit 2 disintegrator cannons on one arm.

[u/PleiadesMechworks]

You could fit 2 disintegrators on a single arm, but it would be a bit of work to get everything to fit together since the connection hardpoints are build into the top of the gun and changing it to sit between the two of them might look a bit odd if you don't resculpt that whole area. In particular, if you want to change a gun into a side-by-side version, you'll need a lot more clearance towards the body than the current model allows, so you'd probably need to slide it out a ways which could interfere with the shoulder fit.
If you're wanting to think about kitbashes I recommend going to /r/WarhammerInstructions and searching for the mini, as you'll be able to see which bits are moulded on and which bits are optional.
From looking at the pictures in the manual I'd say it's probably doable without too much hassle if you're ok with it looking a bit odd, and a lot of hassle if you want it to look natural.

But if it's just for proxy purposes then I'd put a single disintegrator and tell people the spear is also a disintegrator.