I have one from Brownells. Rifle details: Accuracy Speaks di trigger group, DPMS stainless lower, DPMS lopro upper, Warn qr high rings, Redfield widefield fixed 4x scope, and EGW stainless 20" Integral muzzle brake barrel.
@ 100yards:
XM193=1.5"
PMC69Gr.223smb=.5
Remington 55gr.psp=1.0
Federal premium 52 gr. =3/8"
Winchester walmart 45gr.hp2232=3/4"
Fed. Trophy Bearclaw= 3.5"

These are among the better average. Someday I'll get a scope with higher magnification, but I'll work with this on for now. I have'nt seen any post about this barrel, and I was wondering if i have the only one or what! Btw These groups pretty much based on 3 shots.