MustangFrank, r34skyline I misread your guy's comments and mistaken it for another guy I was responding to who really likes the SCAR. I was trying to address the battle proven part.
The XCR to me doesn't look as modern as the SCAR because of the lack in polymer features. I also think the SCAR is a better looking gun than the XCR.
As for the XCR's reliability, across the internet people have been liking it. The youtube videos I posted in the previous pages also give it high praise breaking it down and going through each part and why it makes sense. The guy who runs that youtube channel works in the firearms industry and is very knowledgeable with that regard.
I would say that the manufacturing standards for civilian use are better than military specifications. With the military it comes down to checking a box for liability issues where with the civilian market it comes down to providing the best product for the customer to capture market share. We can see this with military kit for example with night vision. Thats a different discussion though.
Robinson Arms is also a very small outfit competing with the likes of FN and Remington. Securing government contracts comes down to their network and financing which bigger companies have more of.