I went through the same issues when ordering my first AR. I cancelled my order on a RRA and went with a DDM4 v4. I am very pleased with the Daniel Defense its lightweight and well ballanced. I have around 1000 rounds of the cheapest store ammo and old ammo from 15 years ago and it hasent had one hiccup. Not knocking RRA at all just very happy with my choice. It has a 9'' rail on a carbine. Good choice.