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[TFA][AT] Left 4 Dead 2 Perks

If you don't want gmod realism.

Available perks:
RPM+ increases rate of fire, but decreases damage and stability
Clip+ increases your mag capacity, but decreases damage and stability
Recoil- increases stability, but it takes 2 bullet to shoot once
Fast reload increases speed of reloading, but decreases mag capacity by 2 times
Damage+ increases damage, but decreases stability and RPM
Pierce+ just gives you ability to shoot through 1.2x more walls (._.).. And increases damage..