Instead of gaining proficiency with Firearms a bolt-master gains proficiency with all crossbows. He must take the Exotic Weapon Proficiency (firearm) feat to gain proficiency with one-handed firearms, two-handed firearms and firearm siege engines.
A bolt-master regains grit when she scores a critical hit or deals a killing blow with any kind of crossbow. This ability modifies the grit class feature.
A Bolt-Master performs the following deeds with a crossbow instead of a firearm: Bolt-Master initiative, pistol-whip, dead shot, targeting, bleeding wound, death’s shot, and stunning shot.
~Sharp Shoot (Ex): At 1st level, a Bolt-Master can resolve an attack against touch AC instead of normal AC when firing a crossbow at a target within its first range increment. Performing this deed costs 1 grit point.
~Vigilant Loading (Ex): At 1st level, as long as a Bolt-Master has at least 1 grit point, she does not provoke attacks of opportunity when loading a crossbow.
~Bolt-Master’s Dodge (Ex): At 1st level, the Bolt-Master gains an uncanny knack for getting out of the way of ranged attacks. When a ranged attack is made against the Bolt-Master, she can spend 1 grit point to move 5 feet as an immediate action; doing so grants the Bolt-Master a +2 bonus to AC against the triggering attack. This movement is not a 5-foot step, and provokes attacks of opportunity. Alternatively, the Bolt-Master can drop prone to gain a +4 bonus to AC against the triggering attack. The Bolt-Master can only perform this deed while wearing medium or light armor, and while carrying no more than a light load.
~Bolt-Masters Initiative (Ex): At 3rd level, as long as the Bolt-Master has at least 1 grit point, she gains the following benefits. First, she gains a +2 bonus on initiative checks. Furthermore, if she has the Quick Draw feat, her hands are free and unrestrained, and the crossbow is not hidden, she can draw a single crossbow as part of the initiative check.
~Pistol-Whip (Ex): At 3rd level, the Bolt-Master can make a surprise melee attack with the butt or handle of her crossbow as a standard action. When she does, she is considered to be proficient with the crossbow as a melee weapon and gains a bonus on the attack and damage rolls equal to the enhancement bonus of the crossbow. The damage dealt by the pistol-whip is of the bludgeoning type, and is determined by the size of the crossbow. One-handed crossbows deal 1d6 points of damage (1d4 if wielded by Small creatures) and two-handed crossbows deal 1d10 points of damage (1d8 if wielded by Small creatures). Regardless of the Bolt-Master’s size, the critical multiplier of this attack is 20/×2. If the attack hits, the Bolt-Master can make a combat maneuver check to knock the target prone as a free action. Performing this deed costs 1 grit point.
~Shooter’s Resolve (Ex): At 3rd level, a Bolt-Master can spend 1 grit point when making a crossbow attack as a standard action and ignore the effects of concealment (though not total concealment) and cover (other than total cover) against that shot.
Starting at 2nd level, a Bolt-Master gains a +1 dodge bonus to AC while wearing light or no armor. Anything that causes the gunslinger to lose his dexterity bonus to AC also causes the gunslinger to lose this dodge bonus. This bonus increases by +1 every four levels beyond 2nd level (to a maximum of +5 at 20th level).
At 4th level, and every four levels thereafter a gunslinger gains a bonus feat in addition to those gained by normal advancement. These bonus feats must be combat or grit feats.
Crossbow Training (Ex)
Starting at 5th Character level, a Bolt-Master can select one specific type of crossbow, such as hand crossbow or heavy crossbow. He gains a bonus on damage roll equal to his Dexterity modifier with the crossbow. Furthermore, when he scores a critical hit with that type of crossbow, his critical modifier increases by 1(a x2 becomes a x3, for example). Every 4 levels thereafter, she can pick a different type of crossbow, gaining the bonus damage with that type of crossbow as well.