Overflows Magazine from reserves based on the amount of Weapon Kills achieved.
Magazine Capacity Increase per Weapon Kill:
Primary Weapons: 10%
Special and Power Weapons: 20%
Maxes out at 150% Increased Magazine Capacity if activated with a full Magazine. Always rounds up.
(Currently, you can reach up to a 300% Increase by fully reactivating the perk while at or below 250% Magazine Capacity)
Does not refill the Magazine before the overflow effect takes place, the percentages are added to your current Magazine Fill Level.
🡅 Kills provide a slightly larger Magazine Capacity Increase.