Editing Weapon Proficiency (Combat, Ranked)

'''Weapon Proficiency''' (Combat, Ranked) 
You are trained to use weapons.[i] 

'''Benefits''': You are able to use weapons you meet the requirements for without suffering the -4 penalty to attack and defense and to use any special abilities the weapon posesses. You may take this feat multiple times, increasing the range of weaponry you are proficient with. 

'''Example''': A Heavy Flail (+5 Bludgeoning, SA: Ignore Shield, Improved Critical 1, Disarm, Two-Handed) has a Prerequistie: Weapon Proficiency 2. You must have 2 ranks of Weapon Proficiency to use this weapon without penalty and to use it's Special Abilities (SA).