I think the specs are out there now, I know the barrel is Hammer Forged, Fully Chrome-Molly Lined, 1:7, M4 profile albeit not the angles on the cuts I think you usually see on them, M4 feedramps. Supposed to be fully mil-spec.
This is more personal opionions but from what they told me they were “extremely impressed” with two sections particular, first was the lower saying it was very rigid and loved some of the features including those people know about such as the Ambi setup and the QD points but also some you may not notice in pictures such as the extra large ridge around the mag well providing for a nicely beveled inner lip. The second was the BCG and the BCG to barrel lockup, now I am not the biggest AR15/M16 user, never used them much in my particular MOS, mainly used P228’s and later P229’s though I did have to quality with them every three months. So I may get the terminlogy wrong but they seemed to be pretty impressed with the BCG which sounded like they felt it was more riged then some others and where was something about the gas systems seating point being an upgrade to many. He also said that the coating on the BCG’s parts and innder receiver housing seemed to be (and I may be saying this wrong) but some kind of perminantly lubricated coating or a coating that aided in lubrication. That part didn’t make much sense to me how you can have something perminantly lubricated just by a coating put on at the factory but maybe it makes sense to others. Now was is all being told to me by one friend but he was passing along the others comments, and he said he’d love to buy that whole BCG setup and drop it into his own rifle. He was clearly impressed by the rifle, particular considering the price point. In the end he said you wouildn’t do better for less and could actually spend quite a bit more and still only be equil in his personal opinion. His only complaint seemed to be that he wished they’d put a small section of rail as the forward gas block with a flip-up sight, instead of the classic front site that they used. Something closer to what the 516 Patrol Tactical model came with was how he put it.