Target Acquisition Gear is an infrared laser for the purpose of guiding LRMs onto the target, thereby increasing the hit rate and damage, while also reducing lock on time. In the current stage of beta, it also slightly tightens the grouping of LRMs and increases accuracy of Streak SRMs slightly. The TAG Laser uses one energy hardpoint. Much like the Artemis IV FCS, TAG also requires Line of Sight (LOS) between the launching 'Mech and the target for the increase in accuracy to take effect on LRM's.
TAG is a very effective way to nullify the sensor scrambling abilities of ECM. When a 'Mech with ECM is lased with TAG, they are immediately revealed on all friendly units radar. The spotting 'Mech must remain outside the range of the enemies ECM for it to be able to relay the sensor and targeting information to friendly 'Mechs.
TAG will also provide XP and C-Bill rewards. This reward is given to pilots that are TAGing a hostile and that hostile takes damage from other friendlies. Given once per hostile 'Mech per match.