This project by [blackfish] shows off a cardboard lookalike of an MP5 that loads from a working magazine, has a functional charging handle, and flings paper projectiles with at least enough accuracy to plink some red party cups. It was made entirely from corrugated cardboard, paper, rubber bands, and toothpicks.
In the video (embedded below) you can see some creative construction techniques. For example, using a cyanoacrylate adhesive to saturate areas of wood, cardboard, or paper to give them added strength and rigidity. The video is well-edited and worth a enjoy to see the whole process; [blackfish] even uses a peeled piece of cardboard — exposing the corrugated part — as a set of detents (6:56) to maintain the magazine.
Cardboard is a great prototyping material, so long as you can work with its attributes instead of against them, but thankfully we have some ideas on just how to do just that.
[via The Firearm Blog]
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