You do know the CX4 Storm carbine was designed to match up with the PX4? The CX4 can be made to accept the PX4, 92/96 series magazines and there was talk at one time of trying to make magazine well adapters for other pistols. You now need to hunt down another 66 or maybe even a 3" 65. When my wife chose my 2.5" 66 for her gun that gave me a reason to find another and I found a nice 3" 65 a few months later. BTW I have a Beretta 92F at home that is paired up with a CX4 Storm carbine so I have home defense combo that will also work on the job should it be needed and allowed.