I have turned all the switches on, but not able to get the gun, the door stays locked...
My bad, there's little info in the page or the game about how to pick stuff, until today I assumed dropping guns was final and there was no way to pick them, I see now that the `E` key is what I was missing, I assumed `F` was the key since we use it to interact with the vendors, and there's no prompt for the `E` key when sitting on top of the guns or the key card.
I finished the experiment ok now, thanks.