// modpack server guide

Guns&Fun server hosting & setup guide

A Guns&Fun server needs Java 17 and about 6–8 GB of RAM for up to 15 players.

Military Themed Modpack - Real World Gun, Vehicles, Body Armor, Aircraft, Fighting!

By DSN Servers · Updated October 2026 · Forge · Minecraft 1.20.1 · Java Edition

Guns&Fun is a Forge modpack for Minecraft 1.20.1 with 134 mods, 129 of which run on the server. We'd pick our Premium plan (8 GB) for it.

Quick facts

Loader	Forge
Minecraft versions	1.20.1
Java needed	Java 17 for Minecraft 1.20.1 Java version chart.
Mods	129 run on the server134 in the pack. The other 5 are client-only, and the server skips them.
RAM	About 4.5–5 GB for 1–3 playersBy player count.
Downloads	111,528 on Modrinth
Last updated	July 1, 2026 (version 10)
First published	May 24, 2025 on Modrinth
Server support	Required: the pack has mods that must run on the server.
Server pack	Not published separatelyHow to build the server.
Modrinth tags	adventure, combat, challenging, lightweight, optimization

Guns&Fun server files

No. Guns&Fun has no separate server pack on Modrinth, so the server is built from the .mrpack: the Forge server for Minecraft 1.20.1, plus the pack's overrides folder and the server-side mods its modrinth.index.json lists. A modpack installer does this for you; our guide shows how to make a server for a modpack with no server pack.

How much RAM does a Guns&Fun server need?

Players online	RAM	DSN plan
1–3 players	About 4.5–5 GB	Premium (8 GB)
4–8 players	About 5–6.5 GB	Premium (8 GB)
9–15 players	About 6–8 GB	Premium (8 GB)

Estimated from 129 mods on the server with our RAM calculator, not measured: low end if players stay together, high end if they spread out.

Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx7000M on 8 GB. Forge 1.20.1 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.

Guns&Fun server requirements

Java	Java 17
Loader	Forge for Minecraft 1.20.1
CPU	Fast single-core speed (one main thread).
RAM	About 4.5–8 GB for 1–15 players (table above)
Disk	The server files, a growing world and backups
Network	TCP port 25565 open to players

Recommended plan

Our pick for Guns&Fun

Premium

8 GB RAM · planned launch price $30/month

At about 129 Forge mods this is a mid-size pack, and 8 GB gives it room for the mods plus the chunks your players load.

Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Premium servers open.

Join the launch list Compare all plans

More than 15 players, or lots exploring at once? Go up to Heavy (12 GB). Not sure? Email hello@dsnservers.com.

Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.

How to make a Guns&Fun server on your own PC

What's specific to Guns&Fun, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.

Install Java 17.
Check with java -version. Java version chart.
Get the server files.
Build them from the .mrpack, as in server files above.
Start it and accept the EULA.
Run the start script in the server files, or the run.sh / run.bat the Forge 1.20.1 installer writes, then set eula=true in eula.txt if you accept Mojang's EULA (EULA step).
Set the RAM with -Xmx, sized from the table above.
Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).

Or run Guns&Fun on DSN

Once we relaunch (join the launch list), on DSN you'd install Guns&Fun from the panel's Modrinth modpack installer (version 10), pick Java 17 on the Startup tab and accept the EULA in the console. No port forwarding.

How to play Guns&Fun with friends

Each player installs Guns&Fun version 10 with the Modrinth App or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.

Different versions of Guns&Fun on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.

Lag and performance on Guns&Fun

Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once Guns&Fun has enough (tick lag guide). For Guns&Fun:

Measure first: spark's /spark tps and profiler work on 1.20.1 and name the mod or machine using the tick time.
Distances: view-distance=8 and a lower simulation-distance in server.properties.
Pre-generate: Chunky for 1.20.1, /chunky radius 3000 then /chunky start, before people explore.

Common Guns&Fun crashes

What a Forge 1.20.1 server running Guns&Fun hits most. For any other error, paste the log into the free crash log analyzer.

Wrong Java version. Guns&Fun on Minecraft 1.20.1 needs Java 17. Started on Java 8, it stops with UnsupportedClassVersionError: ... class file version 61.0, this version of the Java Runtime only recognizes class file versions up to 52.0. Java version fix.
Out of memory. Guns&Fun (129 mods on the server) needs about 4.5–5 GB for 1–3 players; java.lang.OutOfMemoryError means it ran out. Out-of-memory fix.
Client-only mod on the server. Guns&Fun includes 5 client-only mods, which a server install skips; copying a player's mods folder brings them back and stops the server. Check a mods list with the client-or-server-side checker. Client-only mod fix.
After adding or updating a mod. Mods you add to Guns&Fun by hand usually crash it with a missing dependency or a mixin conflict.
Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.

Updates and support

Before moving Guns&Fun past version 10, back up the world: see updating a modpack server without losing your world.

Bugs in Guns&Fun itself go to its authors: Discord. Server problems on DSN: hello@dsnservers.com or Discord.

More: all modpack guides and how to make a modded server.

Run Guns&Fun on DSN when we relaunch.

Our pick, Premium: 8 GB, planned at $30/month.

Join the launch list

DSN Servers isn't affiliated with Guns&Fun or Modrinth. The pack's name, icon, summary and stats come from Modrinth's public API (checked October 4, 2026).