UPDATE:
Got it in the mail, it can fit but takes some modding. Some material needs to be taken off under the attachment rails' screw holes. The nubs probably line up with holes on the TM SCAR, but these holes don't exist on the VFC. Screw alignment was also incorrect. Instead of butchering the attachment rail, I removed a bit less than a mm from the rear of the extension. The bottom rail does not line up correctly, but I was able to force my grip over.
