Modern Warfare-Content Pack-1.12.2-5.14.1.jar is a beta file of the Minecraft mod Modern Weapons Pack - Orion Rework for Forge, made for Minecraft 1.12.2. It was published on August 17, 2021 and is 17.3 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the Modern Weapons Pack - Orion Rework mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.