The anti-missile system is used to destroy missiles before they strike their target. This is accomplished by using a short ranged rapid firing weapon which shoots at the missiles.
Equipment Specifications
Command Console
Mechwarrior Online
The MWO version is capable of protecting you and nearby (very short range) allies.
Enemy LRM missles are targeted in a 360' zone at 200 meters.
all friendly AMS protects ALL nearby friendly units. (two mechs standing near each other protect each other, 3 or 4 nearby can easily soak up large LRM volleys)
there is no way to turn the buzz firing sound off
Additionally to the 1 slot and weight (1t) of the AMS-system, it takes 1 slot (+1t) to hold the ammunition (which needs to be replenished after battle ... and is advisingly housed in a CASE).