The Proximity Bomb is a crafted trap that goes off when enemies get close. Its recipe sits in the Berley Lake Ambush Camp bunker. Place them in a Horde's path or at a door you expect enemies to use.
Lay a line of them across a Horde's route before you open fire. They also guard your back while you clear a camp. Freakers and humans both set them off.
Set traps before you alert anything, because placing them under pressure is slow. Do not run back through your own trap line.
Attractor Bomb
The Attractor Bomb is a noisy explosive that pulls Freakers in before it goes off. Its recipe sits in the Wagon Road Ambush Camp bunker. It is the easiest way to group a pack and kill it at once.
Baseball Bat Axe
The Baseball Bat Axe is a crafted melee weapon: a wooden bat with a saw blade bolted on. The recipe sits in the bunker of the fourth Ambush Camp you clear. It hits much harder than a spiked bat for almost the same parts.
Superior Club
The Superior Club is a crafted bat reinforced with a small pipe. Its recipe sits in the Jefferson Rail Tunnel Ambush Camp bunker. It is the bat upgrade to make when you have a small pipe but no saw blade.