From what I was told from FR when ordering our Rockwood 2703 the Flagstaff's Sister was some late 2015's had the older front cap with the diamond plate then in early 2016 that switched over the newer one piece cap.
I have heard some people have tried using the PlastiDip Spray (Rubber Texture) on the front cap to protect it from rocks, Chips...etc if you don't like the results it can be easily removed. It's comes in different colors including clear.
2015 Dodge Ram 2500 CTD,CC,SB,4x4
2016 Rockwood 2703 Emerald Edition