Ditto what Antelope sniper said.
Ran a vg6 gamma 5.56 about 3 or 4 yrs ago.
Get it.....
Hone your crush washer barrel side till it hits 9 10 ish tighten to 12.
Make your rig run like a horizontal sewing machine needle.
Not obnoxious.
You will have to readjust zero.
Forget the rest.
Also very easy to clean.
