Here are two from 3824
One is 3D printed with a stand-alone pneumatic system for an alliance partner
https://m.youtube.com/watch?v=l5J21aIJA-I
https://m.youtube.com/watch?v=YynT5unWQAU
The other is very light, 0.04 lbs. Carbon fiber wire.
https://m.youtube.com/watch?v=4AUfgudxsFo
The printed one took 30 minutes to print both arms and the base. We've got both glass fiber (more pliable) and carbon fiber (stiff)