M4 Gun

The mod adds an M4 rifle with its own 3D models, textures and ammunition, plus titanium ore that generates underground and a titanium ingot and block that feed the gun recipe. A rare structure, generated with a 1/1000 chance, holds a car, and a villager trader sells items that need titanium blocks. Two advancements, Titanium Age and Car Age, track progress through the material and vehicle content.

M4 Gun is a Forge mod for 1.20.1 only, and it has to be installed on the client and on the server, so every player and the server need the same build. The license is All rights reserved, and the code is not open source. Version 1.0.0 was published on 2026-05-27 for 1.20.1, after a first release on 2026-05-18. Ammunition is found in the overworld and in the nether and end, so players who skip the overworld may need to look for bullets elsewhere. A cooldown on the gun limits rapid firing on servers.