These two pictures were posted online, and show the remains of a 23mm HE-I round fired by anti-aircraft guns, such as the ZU-23-2
A wide variety of artillery shells are used in Syria, and you can generally tell them from unexploded mortar shells as one end has a gentler taper than mortars, as can be seen in these two examples
So far only one cluster bomb has been filmed in Syria, the RBK 250-275 dropped in Jabal Shehshebo region I blogged about when the video first appeared. Activists made this video show the bomblets and bomb casing (more details here)
Unlike a conventional bomb, a cluster bomb breaks open in flight scattering the bomblets, which means the bomb casing will always be left behind, so if a cluster bomb is dropped there should always be a bomb casing left somewhere. However, it's also highly likely unexploded bomblets will be left in the area, and I would strongly advise anyone in the area to avoid the area the bomblets were dropped.
Grenade cartridges, used in underbarrel grenade lauchers are quite rare, and in the below example we see the remains of a VOG round used with Russian weaponry
Much like artillery, mortars in Syria come in a great range of sizes, all the way up to the massive 240mm mortars first identified as being used in Homs in February. Generally all that remains are tail fins, which generally look about the same no matter what the size. Here's a couple of example, one small and one from the 240mm mortar shell
OFABs are a range of bombs dropped from Hind helicopters, with only OFAB 250-270s being recorded as being dropped in Syria at the moment. I've collected a large number of videos of them here, and the below video shows the most complete example
A variety of RPG rockets are used in Syria, and generally they leave two distinct types of remains. This first video shows the low explosive cartridges used to propel the rockets out of their launch tubes
Then we have the remains of the rockets, which are being pointed to in the below picture (taken from this video)
The S-5 rocket is a common sight in many videos from Syria, launched from Hinds armed with rocket pods. They also featured heavily in the Libyan Civil War, generally fired from rocket pods welded to the backs of pick up trucks.
If you come across any other examples you think aren't mentioned on this page please send them to me and I will attempt to identify them and add them to this page. It should again be stressed that UXO should never be handled as they present a very high risk to the person handling them and anyone nearby.
Two Examples Of Filming Unexploded S-5 Rockets (Updated With Bonus Child Endangerment)
Two More Examples Of How Not To Handle UXO From Syria
How Not To Handle Unexploded Ordnance - A Syrian Top Ten
You can contact the author on Twitter @brown_moses or by email at firstname.lastname@example.org