Guys and gals,
I just got my barrel I ordered and I thought I would pass this on. It looks great and a good deal if you're looking for a pencil barrel for your AR. $99 I wasn't expecting much but it looks like the ad says "A NEW carbine length .625 1/8 twist 5.56 barrel". I might buy another just to have, but here's the auction.
https://www.gunbroker.com/item/896716339

HTH