I call these little mecha figures "Tinkermechs" because I create them in tinkercad. The models are available to download there if you do a person search for "yangeldf." These mechs have swivel articulation on the shoulders and waist, and as the name implies, this is my 5th design. The various mechs have interchangeable parts so you can swap around limbs, legs, and torsos. The green one in the last picture is Tinkermech 1, the first one I created, which this new mech shares the torso piece with.