I went with Novak's setup for a G34 open. It has a KKM barrel that has 5 ports through the factory cutout. It also has a melted Jpoint. It will shoot white box all day with a #12 or #14 spring. My friend also has a G17 with a 3 port aluminum comp from Novaks thats shoots very nice as well. I would give Tim a call to discuss options. He is a great guy!