I used the same package to upgrade my no name AR upper. I started shooting a local military rifle shoot with my AR 2 years ago and I quickly realized that I could easily out shoot the rifle. I originally replaced the standard handguard and that made a big difference (especially when using a sling in prone) but it was not enough. This June, I bought the accuracy special and got it installed before my last match.
I was a happy camper... I shot a 95 slowfire prone and then a 100-5x rapid fire prone (10 shots in 60 seconds with reload).
But the best part was when I put a 6-24x scope on it and did some accuracy testing...Every handload I tried was under 1.5" with most under/at 1" and several under 1/2"
I know it was just one group of each type, but it sure shows potential.
All in all, it is an amazing value...not sure which I like more--the barrel or the trigger!