New 20" AR15's?

[dangertree]

Its generally accepted that shorter barrels are more stiff and tend to be more accurate (in the same profile) due to less flex. With a longer barrel there is a bigger chance of imperfections. The trade off is less velocity and everything that goes with that.

I have a scarey accurate 10.3" 1/7 HBAR. At 100m it shoots bug-eyes. If I shot 100m AR benchrest, it would be my go-to gun. At 600m, with wind, not so much.