i've built 2 of these into scout rifles. 1 5.56 I gave to my dad with an AR, and second a .308 for me. Rifle was smooth out of the box. I've ran dog**** ammo through both regularly and they run just fine. The 308 got real real accurate after warming up the barrel with a full AICS mag through it. I only have a 3x9 on it, same as dad's. But its tighter than I can shoot. If I was willing to buy more reloads I'd shoot it a ton more. I also use it as a deer gun. heavy round is great in the woods. I've put up the 35 rem which was my old tried and true woods gun. the american is just so much lighter and easier to shoot. And the range of the 308 makes it a great all arounder in my opinion. Its like a damn boxer mix, big dumb, heavy, goes forever and hits like a ton of bricks.