The 5HD is the biggest upgrade to the main HCS AFV for years. It has a new gun with much improved fire control and sights, a new generation of the engine and improved armour made of a new alloy (details are being withheld).
The Dinos initially will purchase 1000 5HDs and the HCS 500 though there will be 1000s more over the years. The HCS is estimated to have around 100,000 Tapirs in service and around ten percent are long overdue replacement.