We take a break from our regularly scheduled Smyth Busters episode for a public service announcement from Brownells Gun Techs Caleb and Steve. Almost every new gun owner has asked this question at some point: Is it OK to lubricate my gun with WD40? The guys have a simple answer: No, NEVER! The main problem here is that WD40 is not a lubricant. "Wait," you say, "That one time I used it, the action felt really smooth and slick." Caleb says that's because it's like squirting water into your gun. It'll smooth things up for a bit.... The "WD" in WD40 stands for "Water Displacing." If your duck gun goes overboard and gets submerged, apply WD40 liberally to force the water out of your beloved Remington or Beretta or Benelli or whatever you shoot. THEN wipe all the WD40 off and apply a good gun oil or CLP. If you spray WD40 into the action as a lube, it will get sticky over time and gum up the action. The quickest way to get gummy old WD40 off a gun? Spray it down with fresh WD40, which will dissolve the sticky stuff, then wipe ALL the WD40 off and apply some proper gun oil. So the myth about using WD40 on guns is BUSTED. WD40 is a terrible firearm lubricant!