Horace can spend 3 Grit as an action to make one perfect shot against his observed target with a firearm or ranged weapon. He makes one weapon attack with advantage. On a hit, the attack deals an additional 4d10 weapon damage, and the target must succeed on a Constitution saving throw against Deadeye save DC 18 or have its speed reduced to 0 and be unable to take reactions until the start of Horace's next turn.

As a bonus action, Horace chooses one creature he can see within the normal range of a firearm or ranged weapon he is wielding. He begins observing that creature, provided he is not blinded, deafened, or incapacitated. He can observe only one creature at a time, and the observation ends if he chooses another creature, becomes incapacitated, or willingly ends it.

Horace has a d10 Hit Die for each Gunslinger level. His hit points are calculated using the Gunslinger hit die and his Constitution modifier.

Horace is trained in the use of firearms and relies on Dexterity for firearm attack and damage rolls. Firearms are treated as martial ranged weapons for his Gunslinger features.

Horace gains a fighting style suited to ranged weapon mastery. He ignores disadvantage from attacking at long range with ranged weapons and does not suffer disadvantage for making ranged attacks while an enemy is within 5 feet of him.

Horace has a pool of Grit points equal to his proficiency bonus, 5 points at this level. He regains all expended Grit when he finishs a Short or Long Rest. Grit fuels Gunslinger features and the Deadeye's Perfect Shot.

Horace can use Grit to perform specialized firearm maneuvers, such as forcing a target to reposition, disarming an enemy, or adding precision to a weapon attack, according to the Gunslinger's existing Grit options.

Horace can attack twice, instead of once, whenever he takes the Attack action on his turn.

Horace can draw or stow firearms without using an object interaction and can reload firearms as part of the attack made with them. He can also ignore the loading property of firearms with which he is proficient.

When Horace fails a Dexterity saving throw, he can use his reaction to take no damage on a success or half damage on a failure. He can use this feature only if he is not incapacitated.

Horace can make an additional weapon attack when he takes the Attack action, for a total of three attacks. Once on each of his turns, he can replace one attack with a Gunslinger trick shot that does not require spending Grit, if the chosen trick shot normally allows that option.

Horace's weapon attacks score a critical hit on a roll of 19 or 20 against a creature he has observed with Killing Focus. This improves to a critical hit on a roll of 18, 19, or 20 after he has observed that creature for at least 1 minute without attacking it.

Once per turn when Horace hits his observed target with a weapon attack, he can deal an extra 1d6 damage. The extra damage is the same type as the weapon's damage and represents a precise strike against an anatomical opening.

If Horace spends at least 1 minute observing a creature without attacking it, he can treat his next weapon attack against that creature as though it were made with advantage. The attack must be made before the end of his next turn or the benefit is lost.

Horace has a reliable criminal contact who can pass messages, arrange introductions, provide limited information, or help him find a safe place to hide. His criminal reputation also gives him familiarity with the underworld and its customs.