Minecraft Java 1.21 Mods
Browse 753 free mods for Minecraft Java 1.21 — popular picks include DonutSMP Auction Sniper, The Weapons Mod, MilitaryArsenal.
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DonutSMP Auction Sniper
Automatically buys cheap Items on the Auction for Profit on DonutSMP
The Weapons Mod
This mod adds many a weapon, from blades of ruby and emerald to hats of rabbit. Trust me, you WILL be impressed.
MilitaryArsenal
A military weapons addon for Slimefun4 featuring advanced weaponry, ammunition systems, and coordinate-based bombardment capabilities.

Blackout Revival Tech Reborn
Technological weapons and armors

Coastline
Coastline is a collection of mods designed to improve exploration. Craft planes, sail ships, rest in hammocks, and more.
FoxyMachines [Slimefun Addon]
Unofficial 1.21.x port for FoxyMachines. New machines, tools and weapons!
Deadly Arsenal
Gear up for ultimate chaos with a massive arsenal of weapons (kits) designed for fast-paced PvP and high-energy multiplayer minigames!
Projectile Launchers
A somewhat vanilla friendly mod that adds guns that shoot minecraft projectiles.
voidblades
a Fabric mod for Minecraft 1.21.1 that replaces the blade/head of netherite weapons with an animated end-portal void texture, while keeping a custom teal/green hilt. Supports the netherite sword, spear, and mace, atm.
Flame Mace
A powerful fire themed mace weapon with passive fire resistance, regeneration in lava, and three ultimate abilities including air dash fire ring on hit and unstoppable lava damage.
War of Valor: WW1 Mod
WWI (First World War) Mod. With customized 3D WWI Blocks, 3D Weapons and Uniforms. Along with other WW1 Themes such as trench life and a lot of barbed wire and sandbags. Along with a proning mechanic.
Crafting Blades | ModernisM
a Modern, Gung Ho Minecraft experience, make a NUCLEAR REACTOR in Minecraft? Give it a try.
Rabbit's Amplified Tech
Explore a beautiful amplified world with amazing scenery, planes, guns, automated machinery, enhanced vanilla, and many other ways to lively up your high-heights experience.
INeedMoreWeapons
This datapack adds 80+ weapons and crafts!
A.B.E. Forgery
a mod adding powerful new weapons with unique effects
Create-Big-Cannon-Autogun-Revolution
Create Big Cannons: Autocannon Revolution is an addon for Create Big Cannons that brings a full family of modern autocannon ammunition to your big cannons.

blood mod
This mod is all about blood or well the idea of using blood to make weapons and tools we have 2 types of blood weapons including blood and compressed blood.
[✨] AUTOMAGIC - Survival friendly magic spells, weapons, gadgets, machines, and more! (W.I.P)
Spells meet Supply chains
Ocolet909's Modpack
A mod for me and my friends, first time here. The mod contains food mods such as farmers delight, some weapon mods that add realistic rifles, 1 mod that adds simple tiers, and alot of performance mods to keep it running on school laptops.
Tacz editor
Tacz 1.21.1 edit: craft,damage, recoil of the weapon, and rpm.
Razen's Tension Weaponary
New Tension based weapons to spice up minecraft combat
Windcharge tech & Dash weapons
This is a small project I made for a commission. Implements windcharge stop / reset from many ffas that run on 1.8, a stunslam scoreboard, and dashable weapons.
zMItemsBuilder
zMItemsBuilder is an advanced automation plugin for generating scalable custom items, kits, weapons and more...
zMItemsBuilder | Advanced Custom Items System
zMItemsBuilder is an advanced automation plugin for generating scalable custom items, kits, weapons
Elementify
Elementify Adds a Scientist Villager who trades real chemical elements. Use them to craft powerful, element-themed weapons with unique effects.

Matt's Modular Armory
Mod that aims to add modular tools, weapons, armor and modular machinery with custom upgrades
Crashy!
What if your house could become a weapon?

LMod
LMod is a general content mod that adds features such as guns, a seed pouch, and an Exp Chest!
Gaming of Ammo
Attacking with many thingies that are fun, will be doing some kinds of improvements
Create+ 1870
A curated Create modpack with an 1870 aesthetic - steam, steel, rail, and early industrialisation. No futuristic tech, no magic, no modern weapons.
Steel Tools 330
Added deep slate core, steel weapons, armors and tools
magnen77's Sniper Rifle
Adds Configurable sniper rifle in minecraft using only: datapack & resoursepack
UniversalX CB
A power focused modpack packed with QOL features, bosses, and armor and weapons to battle them. While also maintaining 100+ FPS (new version coming soon)
Guns, Wyrms, and Steam
A Create Aeronautics modpack that makes adventuring a challenge. The End floats high above, while ruins and settlements are spread far and thin. The only way to reach them is to Create.
TNTGun
This project has a tnt gun which allows you to shoot tnt from a custom gun, and also a custom item 'nitro candy', which you can eat to get Speed and you get launched in the air while you have the effect with no fall damage.
SilentTech
Explore the Depths of your Minecraft World while also building up your base to be able to forge stronger Tools, Weapons, and Armor. This is a pack built around Silent Gear and Oritech