Just a thought
 

If its possible hot key for disabling weapon slot, slot 1 being the main one or use normal numbers not pad 1 to 4.
Not imporant but saves calling up info screen to access as find do quite a bit mainly gun equiped units & satchel charges if dont want to splash my own units.
You could see it had been switched in shots left dialogue.

Re: Just a thought
 

So why not use hotkey W and pick what weapon you want to fire?

Don

Re: Just a thought
 

I was talking about temporary disabling as done from info screen.
Example firing tank vs target with my unit adjacent I want to switch off slot 1 to stop splash but fire all other weapons.
Not a problem its just as is takes 6 clicks to switch off & back on including calling info screen this way 2.