ModularWarfare is a 1.12.2 Minecraft mod made for military stuff, it is content-pack based and allow you to create your guns, attachments, magazines, bullets, armors & backpacks.
This new version allows you to add your stuff without minecraft modding knowledges, everything is based on .json files (plain text configurations).
Links:
- Wiki: https://modularwarfare.com/docs/
- Website/Forum: https://modularwarfare.com
- Discord: https://discord.gg/TtzsDXwx9M