5 lb connector and NY1 induce spring in ALL of them. What I have noticed more than these EIGHT guns (a lot more so Along with the 6 G30's of all 3 configurations, but still to some degree existing in The 2 G21's) is the following - It is lighter https://tysonqyyvs.blogtov.com/13331497/detailed-notes-on-glock-30-gen-4