I think that many of us wanting to know where our hard earned money is going sometimes overthink our AR purchases. In the last 5 years I have purchased/built 4 AR-15's, some that I put together for less than $400 with used parts bought on the Internet to one that cost $1600 built from mostly new BCM parts. Under 300 yards my el cleapo AR shoots just as accurately as my most expensive and I'll never wear any of these out in my lifetime. In my case every AR I have is more accurate than the shooter.....me
More expensive does not always translate to better quality though this topic is debated all the time.