Metal, an important resource in Firefall, is primarily collected by Thumping. Thumping is an on-demand mission where players calldown and defend a Thumper for five minutes while it harvests a deposit. There are eight types of thumpers. During this time creatures and in some cases Chosen and Bandits spawn.
There are six types of modules and three types of slots they can go into for weapons and for abilities. This guide oveviews the different types you can equip and where they go. It also covers hidden modules, which is built into your weapons or abilities, and how to remove modules or replace modules.