Getting the Silenced Handgun
Complete the "Out In The Open" and "Getting Back Online" side missions in Chapter seven to unlock the Silenced Handgun. Both side missions are for a man named Sykes. You find him fending off zombies in a parking lot, around the center of the map. You can enter the parking lot through the gate in the south. Kill all the zombiesand rescue Sykes. Then, talk to him in his safe house to complete the "Out In The Open" side mission. He will then give you the "Getting Back Online" side mission, which requires you to backtrack a little bit and use the computer in the northern safehouse. You then get teleported back to The Marrow where you must access a terminal. Run back to Sykes and he will unlock a big orange box in his safe house, which contains the Silenced Handgun.