What I don't understand, is why you offered a quad rail as standard equipment rather than a superior material for your receiver. This is your first production AR why would you want to change the recipe instead of doing a perfect job first?
Most AR users are going to change the rifle to suit their needs/wants so why add an "aftermarket" accessory at the cost of user safety and final product quality? I bet said and done, your quad rail costs just as much as using 7075 in the receiver.
I'm pretty sure I called this post early in the thread























































