On the description, it says the Crabotron have a cannon

The main point of Crabotron is it's military specialization - outstanding durability, damage resistances and armaments consisting of a heavy flamer and an autocanno

but it have the normal machine gun instead.... would be cool to have both variants, at least one with the actual cannon

Thing is it used to have a tank cannon, but without Combat Mechanics Overhaul mod shells would impact it's own legs, causing swift self-destruction, which I didn't realize at first as I use the mod in my games. So I had to compromise with a heavy modified machinegun (it's not exactly normal, it uses 10x ammo per shot, slower and deals massively increased damage as a substitute for an armor piercing high-damage option) as the supposed autocannon (think of it like a small-caliber belt-fed cannon).

Best I can do is add an optional mod setting toggle to add a tank cannon (and mention in it's description that you need a separate mod to not cause self-destruction). Whenever it is I find the time for an update, that is.

And before you ask, I did want to add shell passthrough on crabotron legs, but collision masks feel like a complete mess to work with, so I scrapped that idea.

Oh, I see the issue, well would be nice if you add the option to allow build one with a cannon mount if it is not too much trouble, people can then use any other mod that fix those so you wouldn't have to deal with it, a big warning on the settings options tooltip about the issue so people don't complain when their Crabotron self-explodes xD hahhaha