Replace all the files in patchday3ng folder to
mods/update/x64/dlcpacks/patchday3ng/dlc/x64/models/cdimages/weapons
Replace all the files in patchday4ng folder to
mods/update/x64/dlcpacks/patchday4ng/dlc/x64/models/cdimages/weapons
The Eod tech and Grip cant be removed they are stick to the weapon due to issues cant be fixed if i replaced them to parts like grip, Mag,scope