No they aren't milspec but that doesn't make it bad, they are pretty nice for the money. The only down side I can think of is that the delta ring on these is plastic and doesn't use a spring.
I don't believe the handguards have heat shields, thats the only negative I can think of.
The barrel is 1/8 twist and is nitrided which is pretty nice. The gas block also had a built in QD Mount.
The AR-556's medium-contour barrel is a cold hammer-forged 4140 chrome-moly steel tube with a 5.56 NATO chamber and M4 feedramp cuts. The barrel's diameter is 0.85 inch under the handguard, 0.75 inch under the gas block, and 0.70 inch forward of the gas block. The length is 16.1 inches, and the twist rate is 1:8
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The Mini 14 flash hider also seems like an interesting take.
Ruger AR-556 AR-15 Review: Is It Good, Great, or Junk?
It's an AR so you can fix a lot of things yourself, but if needed Ruger's support/warranty is amazing and I can't complain. It's a keeper/shooter for sure.