First time posting.
Cant help it I just gotta put my two cents worth in. This is about the flex issue on the frame. I have both a k2p and a cm9 gen2. My k2 with a bit of "squeeze" will flex as well. As for the cm9. It seems to have something to do with the serial number being attached to the bottom of the frame in the manner that it is. It leaves a hollow in the poly on the frame at the bottom. However the rails dont actually do anything this far down on the slide. Mine even has a larger gap on the right side than the left. It doesn't effect the performance whatsoever. All the stress is on the carrier back by the trigger. I'm sure you could cut that portion of the frame off and it would still perform perfectly. I sent pics to sar and they said they would replace the frame if necessary. I chose not to. It works perfect and there is no reason to be worried about it at all. At least in my opinion.
