Are you sure about the 17 rounds? The full sized FNS-9 has 17 rounds also, do they use the same magazine???
12 or 17 rounds depending on which mag you use.
I have the FNS 9 and love it. I think if they are going to do a sub compact they should have went with a 3 inch barrel instead of 3.5. Not a big enough difference from the 4 inch to interest me in having one.
I assume the mag pictured is a 12 round. How much longer is the 17 round mag?