Gunsmith Cognitis

Firearms start as hand cannons and arquebuses, which are slow to load, and move toward more convenient muskets as a player gathers better materials and quality. The aim is to make firearms a weapon type that grows more useful over time and can eventually take the place of bows and crossbows. Entry, Intermediate and Mastery tiers mark this progression, and the guns include the Three Eye Gun, Landsknecht Harkebus, Hand Bomb, Wall Gun, Snaphance Musket, Heavy Musket, Axe Pistol, Sporting Rifle, Double Barrel Musket and Pepperbox Carbine.

Pre-percussion cap firearms are reloaded in steps. A player holds the required object in the off-hand and presses R, and some percussion caps are loaded from the other hand. Matchlock weapons need loose gunpowder poured in with the off-hand, a ramrod to seat the ball, and a flint and steel held in the off-hand to light them. Matchlocks also have a windup delay before firing, and that delay grows in humid conditions, rain or water. The mod is licensed under the Creative Commons Attribution 4.0 license and is not open source.

Gunsmith Cognitis is published for Forge and NeoForge, with files for 1.18.2 and 1.20.1 and the latest file 2.1.0 for 1.20.1, released 2026-06-02. Every player and the server need a copy of the mod.