I wasn't sure what info you wanted but I seriously don't put much emphasis or care on any particular rifle other than its general use. Accuracy isn't a real factor because you have to center them anyway and I don't have a particular brand favorite.
I've shot a lot of things from M-60's in the Army and etc and I've pretty always considered a gun as just a gun. You center it, shoot it, you reload it, and you clean and take care of it and that's it.
Oh dear. Vinny, Vinny, Vinny...........
A gun is a gun?? Just zero it & clean it. I can see you didn't get much down range time in the military, basic training & then a desk job was it??
With this attitude there is no way you have spent a lot of time with firearms, no way.
The quality of the barrel alone can make a huge difference to the accuracy %'age of a weapon (zeroed or not), compared to a bog standard, off the shelf AR15.
Then we can talk durability in different conditions, I will give you a clue = the AR50-arctic-warfare .308, can be used in sub zero arctic conditions, to plus 50 desert conditions.
Go find me a $300 bit of crap that fires the same round that could stand up to this.
We could also get into to effective range, but you are not a gun enthusiast so why bother..............
PT