Saved as iges. file since stp. files are not allowed. I did the conversion in Fusion 360. Once uploaded the quick detach levers (3) all open, bubble level is missing pieces, the forward grip is opened and one of the pieces of the grip rotates 180 degrees, and pieces of the scope rings are missing (2).
I have uploaded other iges. files to my account and they work great. I'm wondering if there is a simple fix for this.
Below is what the stp. file originally looks like. Below that is how sketchfab interprets it.