Each piece of gear has several slots for microchips and a power budget that is used to limit what can be put into the item. These microchips come in different varieties, from power amplifiers to attribute boosters to special ability chips.
Many, but not all, microchips can be extracted from the gear to put somewhere else or to mod directly. However, the team is preparing a number of random stat and locked microchips that will make creating the perfect item a challenging proposition. The team wants players to have to make "really interesting decisions" in their gear modding, promising more information later on as to how CBC will work with crafting.