Folding gun ricochet sheild

The cardboard is just show of concept. You can switch it out with anything you like from Plexiglas to metal sheets. It is fold-able to if you don't intend to use it or for storage. When folded, it will stay folded even if you start swinging your gun.
I mainly made this for airsoft purposes so I'm not sure it holds against real steel uses.
Any comments/critics is appreciated and will be taken into consideration for improvement.

Things you will need:
4-8 M4 Bolts preferably 10-12mm
1 rub