– FS2000/FS2002 U.S. Army Virtual RC-12 flight2000it 22 years ago FS2000/FS2002 U.S. Army Virtual RC-12. The Guardrail Common Sensor (GR/CS) is a Corps Level Airborne Signal Intelligence (SIGINT) collection/location system. By Chris Lampard. Repaint by Ray 8,8 Mb – FS2002 US Army Virtual RC-7B ARL/MFSX – Piper PA-28-151 Cherokee WARRIOR– FS2002 RC-12 Guardrail