Like like having loose ammo, so I tried some files I found, but didn't like them and decided to make my own thing.
Clips I found were good, but then the cartridge wouldn't stay in the clip, and then the clips were just loos in a box and didn't stack well.
So I made a clip with and end stop, so it only loads from one side, and then I made boxes to hold the clips.
One box holds 3 clips, so 30 rounds, one box holds 10 clips/100rounds.
The author marked this model as their own original creation.