Well, I picked up a Gen 1 a couple of weeks ago. I kind of wanted to confirm some hunches and ask a quick question, and I offer a few pictures as penance for your time. "Hanna" (you can see the engraving on the slide picture) has a prefix code (DM5XX) that dates her to 1988. Its got the larger/modern slide cutout for the slide stop, and has black internals that look like the updated parts just blackened. Am I correct to assume that she went back to Glock to get the upgrades? Any idea what years they would have used the new style/black parts? Also, this may be a stupid question, but can I drop in the Gen 3 RSA to shoot with? I have the non-captured set up, and it still feels plenty strong, but I'm going to replace the spring since I plan on shooting this thing a lot. One note on the pictures, the exterior is very worn, but internally it looks pretty gently used. It still has copper grease in the rails, also. The guy I got it from had it for a long time and barely shot it. He just had it in one of his truck's map pockets with a clip draw. Anyhow, thanks for any and all info.