There are pencil melonited AR barrels all over the place for a lot less. I have one of the 18" Ballistic Advantage SPR 7 twist on one of my rifles and it shoots quite well. Faxon has a ton of them for around 200 bucks and the Arfcommers seem to like them.
What are your goals for the upper? Those have been shown to produce moa groups when cold, but open up to about 3 or 4 moa when hot. Would be good for a coyote rifle, but not Prarie dog towns.
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