Curse the mission designer (castle)
So in the castle whatshername "hopes you have some explosive on you" to remove the rubble - and there is a missle launcher lying on the table so of course I spend 10 minutes trying to find some ammo and then find one, shoot it, and it does nothing. Try a grenade, nothing.
Then go to the workbench and come back and wtf you can just click to scrap it? That's total misdirection
I want my wasted missile and three kinds of grenade back!
Go into build mode and you can scrap the rubble