Standard lock type FCS with excellent lock time performance.
This part can unlocked during the mission, Destroy Raiding Party. Defuse the bombs quickly and end the mission fast to obtain the part. You should complete the mission around the 1:30 minute mark to get this part.
In Last Raven, this part can be obtained by S ranking the mission Seize the Airstrip. Complete the mission with about 60-70% AP remaining and no allied MTs lost.