This is a small tab that attaches to the Nerf Stryfe's jam door, made to prevent darts from feeding too far upwards along the mag, which would result in jams.
The design is at its first iteration, but could benefit from a few minor improvements with additional features, which I may eventually get to later.
Currently, the only reliable way to attach this is to drill holes and use screws. I attempted to use superglue but the plastic used on the jam door itself is not very cooperative, so I had to resort to screws.
I strongly recommend making rotations before printing by aligning any of the flat surfaces with the print bed. I prefer having it laid out flat, but stacking it upwards works too.