Iran allegedly supplied the PMF, known in Arabic as Hashd Al-Shaabi, with its Qods Mohajer-6 drone, nicknamed M6, which is a highly effective combat attack drone.
A video released by the group this week paraded the new drone's capabilities complete with slick editing and dramatic music.
The M6 is seen taking off from an airfield with the masked operator sitting in a control room. The drone then lines up and circles its target - a corrugated iron shed in a desert location.
A bomb is then delivered at the crosshairs, with a small explosion and cloud of dust erupting on the drone's visual display.
Another shot from the ground shows the shed being blown to smithereens. The video has been widely shared on pro-Iran media.
The PMF, which is a state-sponsored coalition umbrella organisation of almost solely Shia militias, was created in 2014 by the Iranian Revolutionary Guard Corps to combat the Islamic State group (IS).
Its role in the fightback against the group was vital to ensuring Baghdad remained in government hands following the collapse of the Iraqi military in a surprise IS offensive.
Since the IS' defeat, the PMF have been accused of being an effective arm of Iranian interests in Iraq and gaining hegemony in the country. Their unpopular rise has led to calls from populist Iraqi nationalist Shia cleric and political leader, Muqtada al-Sadr, for the group to disband.
The group has also been accused of a host of sectarian crimes against civilians, while also allegedly killing hundreds of anti-government, anti-corruption Iraqi protesters of all sects.
The introduction of the M6 could provide further concerns for the US, following these attacks on its military and diplomatic personnel in Iraq.
It is not yet known how many M6 drones Iran has provided the PMF.