AR-15 Aero Precision & Criterion Barrels 16" & 18" Function Testing

Velocity single stage 4 lb triggers were very good. I think my Wilson Combat triggers may be just a little smoother but I couldn't say for sure unless I did a side by side comparison. Criterion barrels were very accurate! The 16" looks to be about a .75" to maybe just under 1.00" and the 18" looks to be about .5" to .75" MOA! Very happy with the barrels! Had some cycling and feeding issues using the H-1 buffer with the 16" but after going to the standard buffer it would only fail to hold open the BCG after the last round but not always. After cleaning the BCG and wiping out the upper receiver it ran like a top! I think a little more break-in time with the 16" and it will be completely reliable. The 18" performed flawlessly from start to finish! Very happy with how both builds turned out!