On Saturday morning had my gunsmith install a 3.5 ghost rocket connector in my G34 plus replaced springs and added a tungsten 13 lb recoil spring. All I can say Is it is Great what a increadable upgrade and it was cheap it was like $30 bucks for connector and springs and $50 for guide rod and recoil spring.$25 to install and my Glock now has 2 3/4 lb trigger pull and it shoots ALOT better no more over travel and trigger is smoother. Went to the range on Saturday and shot 150 rounds and it is GREAT.I would reccomend this to any of you Glockers that want a better shooting Glock !!!!!!