Some groups of rebels in Syria are using home-made weapons in their fight against President Bashar al-Assad's forces.
Mortar shells are turned on lathes in factories and fired using a variety of improvised launchers. Homemade grenades are launched from giant catapults. Some enterprising rebel groups ahve even built their own armoured vehicles.
The rebels do have an arsenal of conventional munitions – either captured from the Syrian army or supplied by sympathetic foreign countries. But there is also a thriving cottage industry making additional weapons out of whatever is available.
In this gallery we look at some of the homemade munitions used by the Free Syrian Army.