With just a few specialized tools, you can easily install this shouldered pre-fit barrel into your Solus action. Built to our exacting standards, each barrel is carefully honed and lapped at the factory for unmatched precision and reliability. Fluted sendero light profile barrel Muzzle threads with a pitch of 5/8-24 TPI (threads per inch) Twist rate - 1:7.5 Elite Cerakote finish Honed and lapped Compatible with SOLUS actions Compatible with Zermatt/Bighorn origin actions