Phase Pilot pauldrons from Titanfall 2. Most parts are screwed together, while some are friction fit and glued. The largest screw heads are not printed, they are M5 flathead machine screws. The LED areas are meant to have .020" polypropylene diffusers glued in place (you can also cut these out of a milk jug or some other frosted plastic). Internal structure has anchor points for attaching to a jacket with zip ties or straps.

Good hunting pilot!