Aside from the striker spring, what can affect the force with which a striker strikes a primer? An hour ago, I believed that only the striker spring mattered. Now I think otherwise. I have a G19.2 with a Gen 3 slide built with all Glock parts, except for the barrel. It's been giving lots of light strikes lately. I pulled the striker to see if the striker channel is clear. It is. Thinking that the striker spring might be old and weak, I replaced it with a new Wolff standard weight spring. No help. So I replaced it again with a heavier Wolff striker spring. That reduced the number of light strikes but did not eliminate them. Out of curiosity, I tried the problem slide on a different frame - a gen 3. No light strikes. Hmmm... Then I took the slide from the G19.3 and put it on the problem gen 2 Glock frame and, whereas it had been flawless on the gen 3 frame, on the gen 2 frame I had two light strikes on the first magazine. It seems like something in the gen 2 frame (trigger group?) must be somehow diminishing the striker's force, whatever slide is being used. Anyone know what is going on with the gen 2 frame? Barring that, anyone care to hazard a guess as to what is going on with the gen 2 frame? It just occurred to me that headspace may be a factor. I'm going to try different barrels in the problem slide the next time I go to the range.