Uuuuhhhhhh. The picture shows the firing pin and extractor parts for the DPMS. And the bolt, less firing pin for the Armalite. Also....you sure that's the 308 for the DPMS? It shows 3 gas rings where the Armalite's only use 1. Also doesn't show the firing pin spring. Now, that being said, I am an Armalite pusher. Which means that I don't have any DPMS/SR25 pattern rifles.........yet. So I'm not really sure with that pattern. It just got my curiosity going. Either way......Tom will be by eventually to throw the answer out. <laughs>