i use Gunslick on anything that slides. rails, barrel bushing, hammer. everything else gets mobil 1 or moly oil. sometimes, i add stp to the gunslick, depending on the time of year, and what i am doing. for a long range trip in warm weather, i use the stp/guslick. for carry, no way. i dont want to be trying to clean that mess out of my clothes. in the winter, just mobil 1. i use 0w20.