A Counterfire Defence System is a valuable Tau artificial intelligence (AI) sensor suite that was first designed to counter the threat of charging Ork hordes. The system incorporates predictive logic circuits that further enhance Battlesuit targeting systems, ensuring that large groups of assaulting enemies are met with a withering curtain of unerringly accurate firepower. A Counterfire Defence System is a Support System available to most forms of Tau Battlesuit.
- Codex: Tau Empire (6th Edition), pg. 68
- Rogue Trader: Tau Character Guide (RPG), pg. 33