Mastery Points in Space Marine 2 are used to buy weapon perks, and you need to farm them via weapons levels and armory data to progress.
Source: N4G PC How to get Mastery Points in Space Marine 2
Mastery Points in Space Marine 2 are used to buy weapon perks, and you need to farm them via weapons levels and armory data to progress.
Source: N4G PC How to get Mastery Points in Space Marine 2