could you use it for lube?

I wouldn't. Some of it has graphite in it.

On a AR, I would not suggest it. On other items yes makes for a great extreme pressure, high temperature and slow operating speed lube.

eta
Suggested applications: Threaded assemblies, slide fit assemblies, hinges, gears, chains and sprockets cables and sheaves, lever pivot points, rollers, oil-still header bolts, furnace equipment threads, retorts, kilns, ovens, etc., exhaust system bolts and studs, cylinder head gaskets and studs, turbine casing studs and marine and coal mining equipment; farm equipment, heavy equipment trucks, cars, industrial equipment, drawing and forming of metals.

Suggested Applications: Drop forge dies and hammers, catalyst bed and reaction chamber supports. Slow rotating bearings in hot corrosive environments. Lubricate and seal pipe threads in acid environments. Coat gaskets in high temperature applications. Lubricate conveyor chains, chemical plant bolts for pump housing and pipe flanges.

Just thought id ask.  I have used it on suppressor baffles.  makes them easier to get out to clean.

I use it a lot, but never on moving parts. It's works well to prevent threaded parts (or tight tolerance) from siezing from heat and corrosion ( think spark plug threads), but it was nver intended to be used as a lubricant. Oddly, Glock uses it on the slide rails of new guns for break in , but not to be reapplied once it wears off, which leads me to believe that it's a mild abrasive.