Yeah, the mod replaced all of the original arrows with arrows plus this backpack thing. I need the meshes and textures of the original arrows so I can overwrite the modded ones.

Thanks in advance.

This is a guess, but can you copy them out of the .bsa and paste them back to where they were?

Apparently, I could. Thanks!

Glad to help. Did you get your files back?

Yeah, I think. The ones in the .bsa were smaller in size compared to the modded ones, so I think they are fine now.

The smaller size is normal, since mods usually add pixels to existing objects. The most important thing for your case would be that the game is using the arrow files you want it to use.

You can compare the file properties in Windows Explorer with the properties of the files in the .bsa to see if they match.

For future reference, you can actually just delete the models from your data folder; Oblivion will automatically switch back to using the models archived in the .bsa.