Simple Musket

Musket

Holding rightmouse while unloaded will load a bullet from the inventory, similarly to the crossbow.
Holding rightmouse when loaded aims the musket, and releasing fires the bullet. Aim time determines the accuracy.
Reloading takes 2 seconds, and aiming for 3 seconds is enough for perfectly accurate shots by default.
Firing a musket produces a visible cloud of smoke and the shot can be heard from far away, giving away the user's position.

Ammunition

Standard cartridges: Deals 16 damage and lowers the target's armor efficacy by 10%.
Hex cartridges: Halves the target's defensive enchantment efficacy and increases an attacker's damage and armor piercing enchantments by two levels. Sold by weaponsmith villagers.
Hellfire cartridges: Deals 20 damage and decreases the target's armor by 25% for 30 seconds. Found in bastion chests or by trading with piglins.
In 1.21 cartridges can be fired from dispensers, ricochet off of iron golems dealing only 25% of the damage, and are deflected by breezes.

Firepower (I-V): Increases armor piercing of fired bullets by 10% per level.
Deadeye (I-III): Decrease aim time by 25/38/50% and move speed penalty while aiming by 50/75/100%.
Longshot (I-II): Amplifies damage against distant targets. (15-60% bonus at 16-48 blocks, 25-100% at level 2).
Repeating: Allows the musket to fire twice per reload.

Gunslinger/Musketeer Illagers

Depending on the difficulty, 1-3 pillagers armed with muskets will spawn during raid waves.
Being expert shooters, they have an attack range of 24 and do not cause friendly fire damage.
As of 1.6.0, they have been reworked into Gunslingers. They use a sawn-off to defend themselves at close range and retreat when approached.

Configuration

The base reload and aim times of the musket are configurable between 40-80 in-game ticks.
The damage of gunslingers can be reduced by 25%.

Compatibility

(Neoforge/Forge only) If Consecration is installed, enchanted/hex cartridges remove undead protection.
If Enchantment descriptions (or equivalent mod) is installed, the details of each enchantment will be displayed in-game.
(1.8.1-1.21+, Developers only) The behavior code for musket usage by mobs has been refactored and should allow for use by other mods for compatibility purposes. Open a Github issue for any feedback/problems.

Modpacks

This mod can be included in any modpack.

Legacy features

Spoiler

Blast Enchantment (1.5.0 - 1.6.0): Increase main shot damage to 125% within 8 blocks and fires 4/8 additional pellets with 25% damage and increased spread. The maximum damage is dealt if the main round hits, and shrapnel damage doesn't stack.
Copper rounds (1.0 - 1.4.2): When fired, creates a wide spread of 5 pellets which deal 4 damage each and does not pierce armor. Pellet spread affected by the Deadeye Enchantment.
Gold rounds (1.0 - 1.4.2): Does not pierce armor, but deals 9 damage which increases depending on how heavily the musket is enchanted.
Netherite/Hellfire bullet loot configuration (1.0 - 1.6.0): Hellfire cartridges can have their crafting recipe enabled/disabled, as well as their loot/barter availability.
Gunslinger range configuration (1.6.0): The attack range of gunslingers is configurable between 24-40. Intended for use with Enhanced AI.

Credits

Cartridge sprites were originally made by ewewukek and modified by me. Permission to use granted through CC0 on his Github page.