One thing just hit me ...does the J-10B have the IRST optics fitted? In all the pics i saw there's an opaque part where the transparency is supposed to be. It actually hit me when i saw PAK-FA T-50-5s IRST, it has a similar opaque part where the transparency should be (like on other prototypes 50-3, 50-4 etc.) and i assumed it doesn't have the IRST. Thanks.