That kit comes with a lighter striker spring... 4 pounds versus the OEM 6 pound striker spring. I would recommend against using this spring for a carry gun due to the potential of failure to fire. I have tested five different connectors in one of my gen3 G23's and for my purposes, I like the Glock 3.5 connector, part #00135, available from Glockparts.com. I also like the 6 pound trigger spring for that same online service. I have these two mods in three of my gen3 Glocks and together, they return a measured 5 pound trigger pull weight. I would also recommend the smooth faced trigger over the serrated target trigger... easier on the index finger.