I have one Ballistic Advantage barrel on an AR15. It shoots pretty darn good. I didn't have it long enough to do some serious accuracy tests. It's now at my son and daughter in laws. I can't seem to get them to send it back home. I have seen some discussion about their 16" mid length AR barrels being pretty darn accurate. BA makes 9mm barrels as well. If building one is in your future I think you will happy with the results.

https://ballisticadvantage.com/ar-parts/ar-barrels/9mm

kwg

For liberals and anarchists, power and control is opium, selling envy is the fastest and easiest way to get it. TRR. American conservative. Never trust a white liberal. Malcom X Current NRA member.