I'm building a LMT hybrid (Danl Dfnse full auto bolt carrier with billet Shreveport Tact lower) with M4 profile in FDE.
I like LWRC too, but it's way overpriced. I don't see their superior quality justifying that much of a price disparity on their competitors. You can buy a Larue custom for what you spend on a LWRC.
BTW I love the LWRC railskins. Firm, textured and aesthetically pleasing. I have them on many rifles.