In the Kalinatek building, when you overhear two guards talk about gun turrets and wall mines in a hallway, open the door next to the glass wall. Use your SC-20K in sniper mode and shoot the wall mine on the transparent wall. This should take out the two guards that are talking. Switch off the hallway lights and a third guard should come around to inspect the flames. Snipe him down, pick up any satchels, and make your way to the elevator.