That was probably for an AK47, and the dipstick was to be obtained from the nearest GAZ or Technical, provided you avoided being pistol-whipped or butt-stroked by said vehicle's occupants during the process....
Kidding.
Realistically, most lubricants with in an acceptable range of viscosity will probably work-at least for a time. Your choice probably needs to devolve around your expectations of the lubricant effectiveness, persistence, and your ability to check and re-apply as necessary to maintain said effectiveness for expected use scenarios.
My personal preference is to use grease for areas of metal-on-metal component reciprocation, a proven weapon general lube for other metal applications, and a dry film lubricant for difficult to access action parts and inner magazine tubes and springs.
Best, Jon