Unless they changed their first revision, it does not fit on the APX line. The bottom rubber piece of the antenna, is too thick and you can't barely fit it all the way for the center pin of the SMA to make contact.
EM Wave has a 700/800/UHF (a little longer about half inch than the one you bought) and works better. Big Mother tested this one and according to their rf guys, works better than theirs (of course no GPS) and were looking for a way to imprint their logo... But they will not officially say anything about it.
Hope this helps.