Luckily, it’s a plastic stock and I just put the carb cleaner on a patch and used a wood q-tip end to get down into the screws (so I didn’t spray it near the rifle). I can’t seem to get all the residue off, I’m not even sure if it was caused by the cleaner or if it just had gunk from the factory. It’s really hard to see unless I get up really close to it. I just wanted to make sure I didn’t ruin the metal, lol. Also, I think it was the chlorine type, it was auto-zone brand. I know now not to use it! My brother told me simple green from now on.