QAD Auto Injector

My first 3d concept that's not a gun. I was mostly trying to build a workflow with rules and checks to keep it more real in terms of classic manufacturing technics like injection molding, or machined metal extrusions. the concept itself is a first aid injector with dynamically adjusting mixture of stimulants and relaxants, that you could quickly use in more hostile environments, you could use nfc on the back to scan data of a person that needs it before using, or adjust it manually. Slide the big orange slider on the back to extract the needle, and push on big grippy sides to unlock the protective frame. To replace mixtures press the big button on top, and to retract the needle back, rotate the orange knob. That is also my first project where I used zbrush to bevel the model.