Sorry I will get over my disdain for social media and do a proper intro shortly.
This is a smoking deal (normally a $400+ barrel). Advertised as heavy barrel. You would need to have a muzzle device pinned/welded on to bring it to 16"
http://www.x-caliber.net/223-wylde-19-twist-145-fluted
FYI - I just had a Black Hole Weaponry 6.8 SPC2 barrel made. It was advertised as medium profile, but they laser engraved H-Bar on the barrel for me
I'm tempted myself, but 300BO is next on my build list.
"A fear of weapons is a sign of retarded sexual and emotional maturity."
- Sigmund Freud
That is a good deal. 1/9 twist is the only possible downside. 55gr ammo you'd be fine.