From those pics, everything looks kosher except the missing slide lock spring. While you have it apart clean everything and if you have the stuff to polish with, do the 25 cent trigger job and it should smooth out your trigger pull a little bit.
Fixed! Dug through everything I had with me at the range and the trash. Finally found the spring. Installed it and it works. My real concern wasn't the spring...it was the way the trigger felt. Once I put the slide back on it felt like normal. Thanks everyone. I really do appreciate it.
Glad you got it taken care of. If you want that trigger to feel REALLY good and you are going to be down this way PM me or Email me directly gloktr@gmail.com
Great video on the G19 disassembly and assembly in under 5 minutes. The music got old pretty quickly; maybe some 1980's porn music would have been more appropriate.