Syria has a reasonable tech and industrial base, certainly it's no worse than Hamas in Gaza...
Consider for a moment that even Hamas can make weapons that are aerodynamic and have some basic form of guidance.
It is not exactly rocket science, or technically hard to make reasonably accurate "dumb" bombs, you can turn the outer casings out with basic machine tools, or castings if you're really low tech (wax loss casting has been around since the middle ages at least).
The main reason for the barrel bombs is to drop a large, indiscriminate device on civilians, it's not ever going to be useful against military targets because the military (or even just reasonably prepared rebels with access to old gear) will be able to statistically avoid them, even if you use the chlorine gas type stuff Assad is putting in them.
They're a terror weapon for use against civilian targets, nothing more, nothing less.
Consider for a moment that even Hamas can make weapons that are aerodynamic and have some basic form of guidance.
It is not exactly rocket science, or technically hard to make reasonably accurate "dumb" bombs, you can turn the outer casings out with basic machine tools, or castings if you're really low tech (wax loss casting has been around since the middle ages at least).
The main reason for the barrel bombs is to drop a large, indiscriminate device on civilians, it's not ever going to be useful against military targets because the military (or even just reasonably prepared rebels with access to old gear) will be able to statistically avoid them, even if you use the chlorine gas type stuff Assad is putting in them.
They're a terror weapon for use against civilian targets, nothing more, nothing less.