KP9 Buffer Upgrade
I installed the buffer block on my KP9 and it functions flawlessly. It increased the recoil speed dramatically which is a blast for those who like to bump fire. The only issue I have and I actually didn’t notice it at first, but for those who run the Krebs enhanced safety lever, the Hold Bolt Open feature will not work with the buffer block installed. When it’s installed it no longer has enough travel for the safety to reach all the way back and seat in the notch. Had it not been for that I would have given it a 5 star and actually still do on performance but if you have the Krebs like I do then it kind of forces you to make a choice and the Bolt Hold Open feature is something I really like and use. I informed KUSA of the issue as well since the sell both components. For the time being I decided to just purchase another recoil spring assembly that is quickly swapped when I want to use the buffer. .