Need help finding the wall safe/gun storage thread or link.

I tried to give a very descriptive title. There was a thread here a few months back that featured a gun holder that went in your wall. It was not a safe because it was easy to access but looked normal too and did not attract any attention.

I am not interested in buying the exact model because they were expensive as shite but want to look at them to figure out how to build my own.

Does anybody remember the aforementioned thread or know something similar as to what I am talking about?