Five lb connector and NY1 induce spring in ALL of them. What I've observed about these EIGHT guns (a lot more so with the six G30's of all a few configurations, but still somewhat current in the two G21's) is the following - It's lighter and you receive much more https://glock30gen451221.targetblogs.com/33341113/the-5-second-trick-for-glock-30-gen-4