If average is the standard commercial grade AR then I'd say DPMS is slightly below average. Doesn't mean it won't work for you but in normal times you can get better for not much more money. PSA is an example, $700 used to get you a well above average AR with a milspec barrel, BCG and receiver extension.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek