<https://www.newfrontierarmory.com/product/18-308-110-ar-barrel/#product>
<http://schema.org/description>
"Manufacturer: New Frontier Armory\r\n \tModel: 18” 308 (1:10) AR Barrel\r\n \tCaliber:  308 Win / 7.65x51mm NATO\r\n \tTwist Rate: 1:10\r\n \tThread Pitch: 5/8x24\"\r\n \tFinish:  Black Nitride\r\n \tWeight:  3.8 lbs\r\n \t-Dealer Price will appear in cart when logged in"
<https://www.newfrontierarmory.com/product/18-308-110-ar-barrel/>