Lube everywhere metal touches metal, I prefer to grease slide rails. If you want the gun to last long term, lube it liberally… Glock has everyone convinced guns don’t need oil. They don’t care if you wear your gun out, they just don’t want you clogging up the striker channel with oil and grime. They know most of their customers won’t clean the striker channel which could cause malfunctions on the “perfection” platform. Hence, the “one drop here, one drop there” nonsense.