Running a Holosun HM3X on a Unity Flip-Up? The stock lens cap doesn’t fit. So I designed my own: TPU-printed, dual-cap setup connected with 3mm elastic (aka: my daughter’s hair ties). Flexible, rugged, and flip-up compatible. Tactical problems need domestic solutions. STL available!

I designed this foldable spray box to make spray painting cleaner and more contained. The frame is built from 6mm aluminum tubes connected at the corners to form a simple cube. The version shown in the photo uses 50cm tubes, but you can easily adapt the dimensions to your needs. For the walls, I use thin stretch wrap—the kind typically used for wrapping pallets. It’s about 1 meter wide, inexpensive, and easy to find.