Choose a weapon type from the following list: cannons, heavy machine guns, grenade launchers, and rocket launchers. You understand how to use all weapons within that group in combat
Prerequisites: Personal Firearms Proficiency, Advanced Firearms Proficiency.
Benefit: You make attack rolls with the weapon normally.
Normal: A character who uses a weapon without being proficient with it takes a -4 penalty on attack rolls.
Special: You can gain this feat as many as four times. Each time you take the feat, you select a different weapon group.