I use the Tetra Gun Grease and the Liquid Tetra PTFE lube. I like to use them on the bearing surfaces of my pistols and use a drop or two of the liquid on the lockwork of my revolvers. The liquid Tetra also makes a nice protective coating: spread a drop or two on the outside of the firearm, allow to dry and lightly wipe. This leaves a non-tacky PTFE coating.