Stealth armor reduces the asset's active radar signature from 500m to 350m - the lowest in the game. In also increases lock on time for missiles. It also offers the same amount of protection per ton as standard armor, however its one drawback is that the stealth armored asset loses its coolant flush system.
Currently, only the Anubis mech has stealth armor, which allows it to be an excellent scout that can penetrate deep into enemy territory undetected or support strikes on enemy positions with impunity at range. There are currently no plans from the dev team to put stealth armor on other assets.
STEALTH ARMOR Introduced: 3063 (Capellan Confederation) Based on an effort to recover the long-lost Star League-era null signature system, the Capellan Confederation’s stealth armor technology is actually a complex system of heat baffles and layers of radar- and EM-absorbent materials that—while about as bulky as ferro-fibrous armor—provides the same physical protection as standard armor. Limited exclusively to BattleMechs, this system requires the use of a Guardian ECM suite to function, but when activated, the ’Mech becomes virtually invisible to hostile sensors and EW devices. Radical in form and design, stealth armor can undermine even the abilities of active probes, though this system also scrambles its user’s own targeting systems and traps a great deal of waste heat when active.