OOB 17
The following units are armed with weapon n.7, the AK-74.
Units 245 407 408 433 434 435 461 462 463 466 467 468 470 471 472 476 477 488 785 786 787 788 789.
This should be replaced with weapon n.8 the AK-47.
Despite the bewildering variety of AKs employed Iraq always sticked to the 7.62mm x 39.
At most an exception may be made for some of the SF units in the 461-472 range and even there it is pretty unlikely.
For its own manufacture Iraq got a license from Yugoslavia
to make Tabuk rifle, but always in 7.62mm x 39 (Sources: Jane's, US Army Iraq Country Handbook and others).
For online references see:
http://www.janes.com/extracts/extract/jiw/jiw_0384.html
Pretty much all the people I have asked to have confirmed me that the old iraqi military, the new one under construction (until phased out by the M16/M4 being issued) and the insurgents use AKs 7.62mm x 39. No AK-74 to be seen, not in quantity at any rate.
A 5.56mm version was also made
http://www.janes.com/extracts/extract/jiw/jiw_0385.html
but as far as been told it was meant for export and never mass produced. No 5.45mm in any case.