My favorite gun lube - Viking Tactics Rand CLP Gun Lubricant

This is my absolute favorite lube for cleaning and lubricating firearms. It's an extremely effective cleaning lube as well, often getting most grime and powder fowling in one wipe. The consistence of the lube is what I like the most, it's fairly thick and stays on but when you wipe clean there will be thin layer to protect the finish and metal. You can sort of control how thick you want it on certain parts, thin coat or more heavy such as on a bolt carrier or internal high friction part. Perhaps one downside is the applicator is not needle fine. I typically add to a patch or rag first and wipe the firearm down. If the gun is dirty, the rag or patch will be black, cleaning all the residue and dirt. I tend to trust this over some solvents on certain guns. It's a bit more expensive, but I know first hand a lot of professional LE and Mil guys are using this.