I know alot of guys dont use any grease!

However Ive been useing grease when breaking in a NEW AR15 ONLY
Between 1000rds to 1500rds

I put it mostly on the Carrier .

Place that always see worn spots.  Key, etc

This stuff seems to work pretty good  ( TW25B )

The Free SAMPLE I got from MIL COMM will Last me along time
since a Very little go along way