Here is the Mack Core in the FL1-R frame using the Yellow Stinger part set.

Art Director: Todd Keller
Concept Art: Calum Watt and Todd Keller
Design Assistance: Mike Spaulding, RC Torres https://www.artstation.com/artist/ramoncruz
High Poly, Low Poly, Textures, Finalization of Design: Dan Doherty