ammo tray with ammo blocker for ammunition up to  ⌀11mm 

for make this project you will need:
X2 M6 nut
X2 M6 bolt
 

the knobs for the nuts that I use are from internet, you can choose any type of knob for M6 nut.

it doesn't require any support, only for the bottom for the bolt slot. use a raft or a brim to prevent warping (I didn't unfortunately)