almanzo 144 Posted December 17, 2014 I remember having read a leaked press pdf about ArmA2 (which i posted here and almost got sacked for it by placebo) where it mentioned a FCS key for tanks. What is an FCS key? Share this post Link to post Share on other sites
bullet purveyor 85 Posted December 18, 2014 Fire Control System. An aiming assist system used on many modern weapon platforms to help gunners achieve accurate shots. Share this post Link to post Share on other sites
