War is Boring is reporting that Iraqi government troops are being outfitted with rifles from neighboring Iran. The rifles specifically mentioned were the Sayyad, a clone of the Steyr Hs. 50 and a Siavash, a 7.62×51 clone of the US military M40 rifle.
Little information is widely available on either rifle. The Sayyad, also referred to as the Sayyad-2 by some, has been a source of some controversy due to its appearance in war zones outside of Iran.
This video appears to show the Iranian Sayyad-2 rifle:
Additional photos of the Sayyad-2 rifle from the Iran Military Facebook page:
This photo from defence.pk shows a Siavash rifle with what appears to be a synthetic, thumbhole stock and accessory rails:
Thanks to Max for the tip.