The Retro Rex replacement head features a classics styled design, which can easily be installed by popping onto the neck ball joint. The Rex Blaster is an updated design to give FOC Grimlock extra fire power. Features a 5mm peg, making it compatible with a wide range of figures. Colors and design may vary on final production piece.

 

View the full article

I first wasn't sure what the point of this set was, but thinking about it.....most people simply can't afford the asking price for MP Grimlock and this is a nice stand in for him. My only thing I would change is to make the color changing eyes built into the head rather than separate pieces because now you have a loose piece that can wind up lost as well as I'm sure taking the head apart to swap out the color will eventually strip the screw hole overtime....:shrug