ModsJava
Iron Sight Foundry Mod (1.21.1) – Craft Custom Tactical Firearms
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
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Iron Sight Foundry Mod brings detailed 3D firearms and weapon part customization to Minecraft. It adds smooth first-person animations for checking magazines and clearing chambers during combat. Each weapon uses custom models that fit right into blocky worlds while delivering realistic shooting action. The mod also includes custom lighting effects so gunfire lights up dark rooms in real time.
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Features:
- Adds detailed low-poly 3D models with clean mesh designs for all firearms.
- Includes smooth first-person animations for reloading, checking chambers, and inspecting ammo magazines.
- Lets you customize weapons through a deep attachment tree.
- Allows you to swap grips, change handguards, and mount scopes or tactical flashlights.
- Lets you slide accessories along rails to fit multiple attachments on a single gun.
- Changes weapon stats and transforms base guns into SMGs, assault rifles, or long-range DMRs based on installed parts.
- Produces bright muzzle flashes that illuminate dark caves and nearby blocks whenever you fire.
- Uses a custom GPU renderer built to run alongside Iris Shaders without visual glitches.
- Displays on-screen UI cues that connect directly with weapon inspection animations.
- Players using Yes Steve Model (YSM) should turn off the small on-screen player model rendering to avoid visual conflicts.
Screenshots:








Iron Sight Foundry Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Downloads as 502689.mcaddon
- Download size: 10.9 MB
- Download link checked 23 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.