I use high temp lithium grease that you can get at any car parts store. It is cheap and it works.
Lubriplate.com has about 100 different types of lube.I use Lubriplate. It does a super job. I'm not sure what your referring to as to "which type". Far as I know, Lubriplate is Lubriplate, regardless as to who the manufacture may be. But I will tell you, mine came from a Chevy dealership from their parts dept. It is a GM genuine part they sell. Lubriplate was originally created and used in the automotive industry, but the military found its usefulness in weapons and adopted it.
Brownells has it in the same size can as what I got at the Chevy dealership and for about the same price.
Lubriplate.com has about 100 different types of lube.
The M16 series needs to be run wet for reliability. [Dons Nomex.] Since it is pretty well enclosed, there isn't much of a problem with oil. Slightly off track, the new mil-spec CLP doesn't C, L, or P since they took the Teflon out. DISHOUTI don't want to get off subject with this thread but I have a question. I was trained with the various M16 models, and all we ever use is CLP on our weapons. Where do you want to grease it? I watched a youtube video of a guy showing how to lube it but he pretty much dipped his rifle in grease like he was about to fry the thing.
I think 130A is the correct grease, but I'm too lazy to walk downstairs and look.Yes I know, Lubriplate is the name of the company. But the product in question here is Lubriplate grease and I referred to what's sold in GM dealership parts depts and Brownells, of which there is only one. I'm sure it's available other places as well, but those are the two that I am aware of.
See FootSoldier's answer. Best stuff since sliced bread, IMNSHO. I like it mainly because it's easy to remove, which is good because as a NM competition shooter, I like to keep my rifles clean, and change the grease often to remove grit and firing residue buildup. Mobil One wipes off and is easy to replace and won't melt and go all runny when it's hot... (I am in NY, too). I use it on certain parts of my NM AR's as well, (bolt carrier rails, takedown pins, etc...) Great stuff and a tub will last you a loooooong time.Mobil 1. Works great.
As Bevis stated, i use lithium on ..45 autos, m14s and everything between. I custom-blend an oil for use on 'sheen guns, especially beltfeds but gotta have the lithium for special locations.I use high temp lithium grease that you can get at any car parts store. It is cheap and it works.