After a bit of reading it seems Glocks don't like any oil in the firing pin channel. With my M9, I usually clean the channel (it stays very clean) and then put a light amount of oil around the entire pin assembly before sliding the plastic plate on the slide, etc. The oil I've been using is very thin (Castrol Syntec 0w30). It's like water, but it sticks well. Unfortunately, I also experienced some light primer strikes (still debating if it's the ammo or not?). I'm under the "less is more" category for oil use, so I'm tempted to just oil the parts, wipe them down and never have any oil film in there (aside from the end of the pin that touches the sear). Thoughts?