I make sure to do a tear down cleaning prior to getting ready for long term storage. This includes the removal of the barrel from the stock so both can be thoroughly cleaned, cleaning of the trigger assembly, etc. Once this is done I put it back together, liberally use the gun oil on all parts. Just like T7 I leave mine barrel down on a rag for a period and then flip it over for the duration. About once a month a lightly re-oil my guns just to be safe. When I am storing my ML the breech and nipple are always stored out/seperate from the ML. In my case I have a small toolbox I keep my ML items, this way everything is in a single location and no chance for misplacing.

My favorite gun oil is BC Sheath.