Marvel Comic Transformers Continuity
Guardian units are Autobot drones, with the most notable example (often called simply Guardian) being referred to as an Omega Class Battle Droid. Their bodies consist of two-foot-thick armour plating and a hydraulic musculature.
Didn't know who this guy was until recently. After I educated myself about him decided to do a kitbash.
I used craft Foam for boots & Feet. Did a bit of tooling on head, face & belt. Painted with Testors model paint, touch up & detailed with Sharpie paint pens and sealed with DecoArt All purpose.