Can you use WD-40 on a firearm, or will it damage the gun?

Can you use WD-40 on a firearm, or will it damage the gun?

Asked: Can you use WD-40 on a firearm, or will it damage the gun?

For most firearms, WD-40 is fine if you’re just trying to put some protecting lubrication on it against moisture. The WD stands for water displacing formula #40, so that’s what it does. It’s fine for wiping down a shotgun after a day of waterfowl hunting or getting some light oil on the gun after a rainy hunt.

But there are better lubricants you can use on firearms than WD-40. You can buy good lubricants from Lucas, Hoppes, Otis, Outers, and other brands.

But guns don’t put anywhere near the stress on oils that a car engine does, so you don’t need an oil with super-magical additives or properties. You can even use automotive oil if you like. Just a drop on moving parts is plenty. You can even use transmission fluid (ATF-Dexron) but be careful as it can stain clothing red.

Light oils like WD-40 and 3-in-1 oil will dry out over time and leave some slightly gummy reside. Many oils will evaporate or dry up after several years.

The easiest lubricant to find is probably Break Free which works as a cleaner, lubricant and a fair protectant.