There are a number of 3D assets in project Argo that would fit into the ArmA 3 sandbox. These 3D models seem to be unique to project Argo but could easily be added into ArmA 3.
Among these are props such as crashed space capsule, cargo boxes, and radar stations. Seeing as they are already implemented in Argo I imagine that implementation into ArmA 3 would be trivial.
I've included pictures of these assets in this request.
Cargo boxes and Space capsule
Radar dish/tower and more boxes