Weapon Specialist (Ex)Source Weapon Master's Handbook pg. 19
The fighter selects a number of combat feats that he knows equal to his weapon training bonus with the associated weapon group. The selected feats must be ones that require the fighter to choose a type of weapon (such as Weapon Focus and Weapon Specialization), and the fighter must have chosen weapons that belong to the associated fighter weapon group. The fighter is treated as having the selected feats for all the weapons in the associated weapon group that are legal choices for those feats. The fighter is also considered to have those feats with these weapons for the purpose of meeting prerequisites.