Castile, are you a gunsmith? No, you are not. I am. And I will tell you that WD-40 is not a good gun lubricant. I made a lot of money over the the years from people who think it is. Every year they'd spray WD-40 over the CLP I put in their guns they brought in because they they'd used WD-40. They'd usually accompany the gun with a story of how they missed the buck of a lifetime because the gun didn't go off. Then I'd disassemble it and find the inside gooped up with WD-40. I'd detail clean it, relube correctly with BreakFree CLP and lithium grease where needed, and write clearly on the tag, "DO NOT LUBE WITH WD-40!!!" Then I'd see them come in again after hunting season with a WD-40 gooped up gun. This happened many times, over several years, so it is not merely anecdotal.So keep lubing your guns with WD-40, people; your gunsmith is counting on it.......
I will add that I do use WD-40 as a fish attractant for ice fishing. The crappies go wild over it.