Custom items are weapons and armor that can be modified to change the level and attribute bonuses on the item. A custom item obtained at level 10 can be continually modified and upgraded over time. Custom items can be of any rarity starting with Uncommon all the way through Legendary.
Some custom items are devoid of attribute bonuses while others come preloaded with modifications. The bonuses of a custom item seen when inspecting the item are the combined total of each part within. Custom items given as mission rewards often come with a complete set of modifications within.
Modifying custom items
Although item modification stations exist in the game, they confer no advantage over modifying an item from the character screen or inventory.
Modifications that can change custom items fall into two categories - ones that change the armor/damage rating of the item and ones that change attribute bonuses only. Core components change the weapon or armor rating of the item, granting more weapon damage, Force/Tech power or armoring. Secondary components make up the attribute bonuses of the item.