A few grammar smoothings are required - for instance, "with service designation MiG-5 was reserved" is rather awkward. The Russian words defining OKO should be italicised, for two examples. Also, the "design and development" section should be subdivided, I believe - the flight testing should be in a seperate section/subsection.
References are accurate and reliable, without OR. While technically meeting the requirement I think the long paragraphs shouldn't be cited just at the end - it's an invitation for later additions to "pretend" to be referenced.
My articles may be hijacked later on, but I'll take that risk.--Sturmvogel 66 (talk) 02:13, 1 December 2011 (UTC)