We've just released a set of heavy weapons for our Middle Eastern Irregular range in 15mm. The set contains four light machine gunners with PKs, one figure armed with a Russian MANPAD, one with the huge RPG-29 anti-tank rocketlauncher, a team manning a Russian mortar, a team manning a DshK, and a team manning a Sagger launcher. These irregulars are suitable for a wide variety of insurgents, rebels, militias and other factions over a wide period, including the infamous ISIS.

In the set there's also a spare rocket pack for the RPG-29. This is best attached to the back of a fighter armed with an assault rifle, who would lug the rockets and probably reload the weapon.
Available now -- they're listed right under the Israelis on this page:
http://khurasanminiatures.tripod.com/modern-middle-eastern.html