keep on down the only path forward to discover a computer console that will unlock the office door. M-358 Talon weapon : In the Priority: Citadel mission, while in C-Sec HQ, you will come into a dark hallway with four offices.M-5 Phalanx: In the Priority: Tuchanka mission, it is located on the ground, up the steps leading to the long stretch where the Reaper begins firing its laser at your team.
After re turning on the power, look for the weapon before turning on the elevator. Mass effect 3 weapon locationsmass effect 3 Pistols locations