Five lb connector and NY1 trigger spring in ALL of them. What I have observed more than these 8 guns (extra so with the 6 G30's of all three configurations, but still relatively present in the two G21's) is the next - Needless to say you can find the KKM https://glock-30-gen-432222.prublogger.com/32054677/detailed-notes-on-glock-30-gen-4