AMI International report says of a total of 25 units of FACs. You can check the link below, perhaps you have not read it properly when it was discussed in Bangladesh Navy thread. Thing is, why some expert (not you) should think that BN will stop at building only a TINY number of 5 units of very small-size FACs whereas the number of frigates will top one dozen, corvettes almost the same. Then there are good number of OPVs. So, why only the FACS should be five?
Some people really lacks imagination and frequently ask for links. Any Navy inducts more number of smaller and easy to operate FACs than the bigger ships which are used only during a real war, and sometimes in exercises.
It is obvious that BN's immediate target is to build 5 units and to build a total of 25 FACs or more in the near future. I ask these negative-minded people what is so wrong with this assumption? Of course, I cannot supply him a link for my assumption, sorry.
http://www.imdexasia.com/pdfs/AMI-Naval-Mkt-HN-March2013.pdf