What's the difference between a frog and a toad, and who cares, anyway?
I was an armorer in the army just when they started getting into the Breakfree thing. It was a very poor lube for machineguns, and we went to the motor pool and got moly grease to lube the locking lugs and bolt raceways on our belt-fed machineguns. Now a whole generation of shooters think that Breakfree is the only thing you can use. Quite frankly, its not a bad lube, but it started the whole "magic oil" movement. These days, as before I use either a 30 or 90 weight synthetic oil depending on the application, or GI rifle grease. Oil is oil.