Well I thought I'd never do it but its going to happen. I decided I'm going to pick up my first Glock and go with the 19. I was wondering in terms of after market parts what did y'all do to yours? I've seen some people spend some crazy money on them. What's the best aftermarket trigger? Recommended upgrades? I've heard that the first thing everyone usually does is replace the plastic sights. Any and all advice would help.