Secondary Expert

Secondary Expert is a Loadout Option in Call of Duty: Infinite Warfare. It allows an additional attachment on a player's secondary weapon and can be equipped up to two times, allowing a maximum of four attachments and an optic. This option does not need to be selected separately from any additional attachments, but adding a third or fourth attachment costs 2 Allocation Points each. Each Primary Expert slot is unlocked separately, with slots being unlocked at Level 24 and 34.