Weapon flashlight

Night, no moon, and something is moving inside your compound. With a light under the barrel you can sweep the corner and shoot in the same motion. A handheld flashlight cannot do that: it fills your hands, and the most it offers in a fight is a swing to the head.

Press F to switch the beam on and off, and practise until you do it without thinking. The light shows you to everyone in the area long before it shows them to you. Keep it off while you move, flick it on for the room you are clearing, kill it again on the way out.

It is cheap. A Level 1 workbench and three pieces of high quality metal get you one, so a fresh wipe is when it earns its slot. It goes under the barrel, the same place a lasersight sits, and later in the wipe many players trade the light for the laser's steadier aim. SMGs such as the Thompson take either one.