Tier 1 - Equipment damage also has a small chance to apply a random base Ammo Mod effect
Tier 2 - Reduce Ammo Mod cooldowns by 20%
Tier 3 - When random Ammo Mod is applies it uses the Ammo Mod's current skill tier instead of the base
Tier 4 - Increase enemy elemental weakness damage by 50%
Tier 5 - Reloading creates an electric damage discharge that damages and stuns nearby normal enemies. The more empty the magazine, the stronger the damage.