5 lb connector and NY1 induce spring in ALL of these. What I have observed over these 8 guns (extra so with the 6 G30's of all 3 configurations, but nevertheless considerably present in The 2 G21's) is the next - That's based on operator-documented issues in the earlier G30SF https://bookmarklinking.com/story5148761/the-ultimate-guide-to-how-do-i-buy-a-gock-30-gen-4-online