Just bought the control core grips also but haven’t fired it yet to see how they help with recoil. Have a 3” fixed sight version, really like the gun. Was lucky to find it and sold the 640 for the same price that the K6 cost. The DA/SA Target looks intriguing also. Waiting to see if .327 is in their future. Really like the trigger pull, easy to realign the sights before firing. Larry
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