Most of you know I'm building my first AR and I've already got my Spikes Tactical lower in. Now that I'm ready to the buy the upper and I've narrowed it down to a Daniel Defense complete upper or getting the Arma-Lite M15A4 complete upper. Now I've only fired a Bushmaster in my lifetime, so I don't have alot of experience with these two companies. So I wanted to know what you guys think of these companies? I live in the Desert so they'll be getting dirty cause it's windy, dry and sandy over here.