Board Thread:General Nerf discussion/@comment-33092097-20191109051146/@comment-30049823-20191109204952

There are quite a few schematics for Lego guns that shoot various things (Lego blocks, etc), but not a lot for darts.

It's a bit problematic because for air-pressure propulsion, you need a round barrel with a pretty precise inside diameter, which you can't build with pure Lego parts.

For a flywheel system, the barrel becomes irrelevant, but your new problem is the cage, which you'll have to prevent from falling apart under pressure... which isn't one of Lego's strong points.

Not a completely ridiculous idea, though! You could build a cage with Expert Builder axles and gears, and motorize it, and make sure you've got a SINGLE Lego piece that's common to both axles, and on both sides of the cage, that will prevent darts from pushing the whole thing apart while they go through.

I might have to draw a picture to 'splain it better...