This shouldered pre-fit barrel is ready to be dropped into your SOLUS action with just a few specialized tools. Each of these barrels are manufactured to our highest standards featuring a honed and lapped barrel from the factory. Barrel Features: FDE Cerakote Coating 5/8-24 TPI muzzle threads 1:10 Twist Rate Honed and Lapped Works with our SOLUS Actions Compatible with Zermatt/Bighorn Origin Actions