Creating content around a specific file like "WEAPONS-PLAYER.rpf" requires some context, as this file extension typically suggests it's related to Rockstar Games' RAGE (Rockstar Advanced Game Engine) games, such as Grand Theft Auto IV, Grand Theft Auto: The Lost and Damned, Grand Theft Auto: The Ballad of Gay Tony, Max Payne 3, and possibly others. The ".rpf" files are package files used by Rockstar Games to store game data.
Even experienced modders hit snags with WEAPONS-PLAYER.rpf . Here is a quick troubleshooting chart: WEAPONS-PLAYER.rpf