Five lb connector and NY1 induce spring in ALL of them. What I've observed above these 8 guns (far more so with the 6 G30's of all 3 configurations, but still fairly present in The 2 G21's) is the next - In my opinion, much better than inventory. The cause https://glocknation.com/product/glock-30-gen-4/?add-to-cart=17933