Rebels with Surface to air missiles.
Rebel fighter shows off a captured Surface to air missile after rebel forces overran a weapons stockpile in Abu Kamal. 8-31-12.
Aftermath of a rebel ambush on Syrian army soldiers in Aleppo, 1/15/13
Im not really sure what is going on here. But its bloody.
Probably a tank round
Out playing In they're ZSU 23-4,oops I mean ZSU 23-2