Is there a general consensus or rule of thumb on whether to use grease or oil on the bolt carrier, bolt, and rails of an AK 47. I understand that oil is used on various pins, etc., but I am wondering about these three areas. Reason I ask is that I have heard both answers, but I normally use grease on these three areas of my other milsurp items. However, two reasons I was given for oil on AKs in these areas is to not to gum things up, and that AKs should be run more on the dry side. Thanks