Every time GTA V receives an official update, your RPF files might become outdated. You may need to "re-mod" the newer version of the file after an update to prevent crashes.
The Final Frontier of Modding: Introducing the WEAPONS-PLAYER.rpf Concept
: Ensure the new weapon has a corresponding HUD icon so it appears correctly in the weapon wheel [25].
Below is a blog post designed for a gaming or modding community.
Look for "Add-on" or "Replacement" weapon mods. Replacements specifically target the files inside WEAPONS-PLAYER.rpf .