Here are some close-ups of the arms and legs. They are made from DuPont Zytel®, very strong and resilient in a wide range of temperatures.
Guillermo had some break force testing done, the results were impressive:
In the center it takes 204 lb (92.5 kg), and at the tip 772 lb (350 kg).
Sliding dovetail and set-screw retains the legs, allowing for easy replacement if needed. Picatinny rail mounting system integrated into the bottom of the arms provides endless mounting options for accessories.