It's based on THIS, basically it's the top piece in the drawing, with legs added. I had to enlargen the slot where my Beretta 96 sits to 1 1/4" wide and deepen the slot where my beretta 71 sits by 1/2".
Before:
After:
I will also be changing the layout below where my rifles sit as there is no way it can fit four (in the styles I like). I plan to make individual magnetic muzzle holders for each rifle.

Before:

After:

I will also be changing the layout below where my rifles sit as there is no way it can fit four (in the styles I like). I plan to make individual magnetic muzzle holders for each rifle.