I don't know about other versions, but the C1 could very easily be converted to full-auto (speaking from personal experience) by what we called "paper slipping". You take some foil paper from a cigarette pack, fold it up into a small square and slip it.... well you get the idea. Worked quite easily. Of course it really was a useless thing to do as FALs are useless in full auto anyway. Way too hard to control. I think only Belgium and Australia made full-auto versions (someone correct me if I'm wrong) and most other countries chose to do a semi-only version. Not talking about heavy barrelled versions here of course. If gang bangers all had FALs converted to full auto our city streets would be quite safe. Don't know about low flying planes though.