So my idea is here, what does that mean? Is Ssilk a developer?

Plastics already are in the game so it shouldn't be too out there to have them. Plastics, explosives, and such can be assembled to create C3, C4, or C5. That is, if C5 is a thing. It is planted with a pre-set timer to eventually blow up and level everything near. Can be attached to walls, ground,veh...