I jumped on the bandwagon - at least as much as I can. I bought a barrel, upper, bolt, mags, and some factory ammo. I had enough spare parts lying around to complete the upper (mostly almost-new takeoff parts from various builds where someone wanted X part instead of what came on the gun).
Well, long story short, this 22" criterion 1-6.5 twist barrel is a freaking hammer with the cheapest ammo I bought. Oddly, it outshoots the ELD-M 88gr stuff I bought by a good little bit. I have not shot anything over 1 MOA with this rifle and 75gr FMJ yet. Not one 5-shotgroup. Including all the flyers - all under MOA up to this point. Most significantly under 1 MOA, several under 1/2 MOA. I was shocked by this little laser beam, but have not shot it past 200 yards yet.
So, I'm loving the accuracy, but I don't know what it would do in meat. I'd love to see what the short list of available factory ammo does in ballistic gel. Only thing I could find on the youtoobs was 60gr ballistic tip in clear gel.
Help me obi-wan.