This rail is very thin and lite for the 308 platform. It was easy to install and feels great on my Aero M5 pistol build. For those interested the anti-rotation feature indexes off of the gas tube. And do yourself a favor and just get the wrench with it unless you know you have the tools to install it properly.
All I can say is that this rail was an awesome addition to my build and is exactly what I was looking for.