DO-IT-YOURSELF WEAPON SYSTEMS
When all else fails, Syrian rebels are manufacturing their own weapons to combat Assad's military. These DIY weapons have been less of a feature in Syria than in the Libyan civil war, where rocket pods welded to the back of trucks appeared to be everywhere you looked. But they're still present, ranging from the incredibly basic -- such as a giant slingshot used to launch explosives-filled bottles -- to the more complex. In the above video (at the 2:40 mark), Syrian rebels appear to commandeer a fuel truck to fashion a homemade flamethrower, which they use to set alight a building.
Some of these weapons systems even have their own workshops dedicated to producing ammunition for them. This video shows what appears to be one of the more elaborate examples -- a homemade multibarrel rocket-launcher system. Here rebels make rockets from the remains of RPGs and fill them with homemade explosives.
The upcoming battle between the Syrian army and the FSA in Aleppo will be a test for both sides. The FSA has had plenty of time to prepare IEDs and ambushes for Assad's forces, and the lack of infantry support for Syrian armor could result in a massive number of tank losses. We may also start to see some of the armored vehicles captured by the FSA in earlier fighting come into play.
For the FSA, it might not be a matter of winning in Aleppo, but of doing the most damage before retreating, as it has done in the past. But if the Syrian army continues to fight as it has been, it's likely to suffer heavy losses before retaking the city.