Fans of Terminus actions will be an even bigger fan of the PROOF Research Carbon Fiber prefit barrels designed for the Zeus and Apollo action. PROOF's Terminus prefit barrels will arrive threaded/chambered with 5/8x24 muzzle threads. This is a shouldered barrel that requires few specialized tools for install. They're offered with a variety of caliber, lengths, and twist rates in carbon fiber.
* These Terminus prefit barrels are pre-headspaced. However, it is always recommend to double check headspacing with proper gauges before firing a rifle.
