Direct proof of use
The clearest source-backed link between 82 mm mortar bombs and the Syrian Civil War is Conflict Armament Research's documentation of tube packaging for a Chinese W87 82 mm mortar projectile in Kobane, Syria, in February 2015. CAR recorded the packaging during a wider field investigation of Islamic State weapons and ammunition in Iraq and Syria, and later noted matching W87 packaging with the same lot number in Tikrit, Iraq, in April 2015.
The Kobane evidence is a materiel record rather than a specific strike record. It supports the presence of W87 82 mm mortar-projectile packaging in Islamic State conflict materiel in Syria, but it does not identify a particular 82 mm mortar firing, target, casualty event, or launch crew.
Sources: Weapons of the Islamic State
Timeline
Islamic State forces besieged Kobane from September 2014 until January 2015. CAR's Kobane dispatch describes a post-battle field investigation conducted from 20 to 27 February 2015 alongside YPG units documenting weapons and ammunition captured from IS forces.
In that same February 2015 Kobane evidence set, CAR later documented the Chinese W87 82 mm mortar-projectile packaging. The matching-lot packaging found in Tikrit two months later gave CAR a cross-border lot correlation between Syrian and Iraqi battlefield materiel.
Sources: Islamic State Weapons in Kobane, Weapons of the Islamic State
Narrative
The 82 mm mortar-bomb record fits a broader Kobane battlefield picture in which Islamic State relied on captured weapons, ammunition, and improvised munitions during an urban siege against Kurdish forces. CAR's Kobane dispatch reported that YPG units captured significant IS materiel, while its later Iraq-and-Syria report placed the W87 82 mm mortar-projectile packaging within a larger set of traceable conventional materiel documented across IS fronts.
For catalog purposes, the supported role is indirect-fire ammunition held or fielded within IS conflict materiel in Syria. The sources do not establish whether the particular W87 lot documented in Kobane was fired before capture, stored for later use, moved from another front, or recovered from a position after combat.
Sources: Islamic State Weapons in Kobane, Weapons of the Islamic State