Just finished this one. I assembled the lower and Big Shot armorers of San Diego built the upper. The only unusual part is the Loki Nickel Boron Bolt Carrier Group.
I hadn't originally intended to use this part, but Rock River Arms, who supplied the upper and mid-length stainless heavy match barrel discontinued their chrome BCG while I was waiting for my parts.
It's pricy, but very well made. Feels like it's lubricated even when dry. My rifle has had zero malfunctions through the first 300 rounds using various commercial and milsurp ammo. Also has been very accurate.
I like westerns because nothing ever goes to trial.