Nano-Oil from StClaire weight 85 - 15 cc
If not the very best, it is one of the absolute best lubrications out there.
For knifes and guns or other applications were metal meets metal. It could be explained as liquid ballbearings.
Its an expensive product, yes - but compared to other lubes that are sprayed on, this is very saving as you only apply the right amount on the right place. which in the long run saves a lot of product and dont create a mess!

Text from manufactorer:
"Armament Lubrication for the new millennium
Metal to metal anti friction lubricant. No ptfe or moly. Magnetically induced molecule is 0,09 micron, adherses to sub-microscopic metal crevices providing an extremly low-friction dynamic contact"

"for Guns, Rifles, Pistols and Knives use the 10 weight
use the 85 weight on all Rapid Firearms if you favor a thicker lubricant or as a base before applying grease ex. M14 AR-15
Smooth action is instantly noticeable and guaranteed on all Firearms and Knives after applying only a few drops to all moving parts including the sear and bullet ramp."