Part 1: After reading great reviews on the KKM from so many people, I got one for my G34 Gen4. I've had my 34 for about 6 months, and was shooting a Gen4 17 before that. I took it to the range and want to see if my groups would improve over the stock barrel, and if it ran my ammo OK. I shoot Atlanta Arms & Ammo 9mm 147gr reloads (130pf on a G17). I shot 100 rounds from a bench rest at 25 yards, and I was making sure to have smooth trigger presses without disturbing the sight picture. I shot about 40 from the Stock Barrel and 60 from the KKM. I took about 5 shots to the berm with the KKM before shots on target. Here is my best group from the Stock Barrel (12" target): Here is my best group from the KKM (12" target): All my shots were taken with this sight picture: Wanna kill these ads? We can help!