I just ordered 5 more. MidwayUSA has them down to $11.02 with free shipping when the order is above $50. These will definitely NOT work with 9mm. I learned that the hard way when I did a range trip with my 9mm P07 and only brought .40 mags. I wish that CZ would dump their +2 mag bases for 1/3 the normal list too so I can properly configure these for 14 round carry. A 14+1 .40 P07 is a really nice carry option.