I've decided to buy a new ar instead of doing a build. I know most people suggest doing a build but I know nothing about ar's and I want to buy one, shoot it, add stuff to it and then do a build a little later down the road. My question is this: I want to get a rifle with good quality iron sights to shoot right out of the box and add a really good red/green dot reflex type sight later. I want to be able to use the iron sights as a back up after the reflex is added. Should I get a rifle with folding front and rear sights to start with? Do both front and back have to fold down to do this? What are my other options if I don't want do a build yet? I think I like the Bushmasters or RRA's. This is a Bushy BCWA3F16M4AR. It already comes with folding front and rear sights. Is this a good place to start for what I want to do? Any guidance on this would be greatly appreciated as I have just started researching AR's.