OP
It's already been stated that you don't need to over complicate $hit with super slick race gun parts just to try and reach some rifle nirvana point.
Case in point. I've got a 12" AR-10 SBR that I've taken out to the desert fall shoots that we do every year. I've stated many times that I love building rifles, I love shooting rifles....but I absolutely HATE cleaning rifles. But, that being said, I didn't bother cleaning this rifle between the fall shoots last time out. Needless to say. We go through ALOT of ammo at some of these get togethers. But my "little", ball of hate-filled SBR didn't even hiccup last time out. Why? Because it has nothing but.....standard Armalite AR-10 parts with a Noveske barrel. The only "modified" parts would be an extra heavy buffer from our guy Slash and a Geissele trigger.
And that is why this thing just works. Even after being dragged through the dirt. And even being a "short barrel", it'll bang steel at 500 yards.