Second impressions....STILL impressed.
Weight, compared to a Billet A4 upper: 3.4 oz heavier.
Body of upper is double the thickness
Bolt carrier is NOT nitride or melonited, but nearly the right color and feel.
The carrier IS DRILLED to use the bolt handle on either side. So, if a person had a mill, it WOULD be possible to have a left side charging with right eject. Believe the upper is plenty thick enough for the amount of metal to be removed.
Fit - checked fit with an Anderson (integral trigger guard) and a MAG magnesium lower. Nothing short of superb. Tight. No gap. No slop.
Checked the bore for the carrier with a PTG and Wheeler Engineering upper truing mandrel. Very good fit, in terms of consistent diameter.
Checked the receiver face to barrel extension squareness - not perfect, but closer than any forged or billet upper I have used in the past.
Fit to normal aesthetic lines of either lower - good. Almost every brand changes the externals a touch.
Checked upper to forend fit - perfect. The rail actually lines up with the particular brand of 15" forends that I use in most of my builds.
Picatinny is NOT T marked - if that is a consideration for anybody.
Bolt carrier is NOT m-gun cut.
Would I buy another......based on the above....YES...without hesitation.
Obviously have not assembled the upper and use it though.