The Christensen Arms .308 Winchester 18″ Carbon Fiber/Stainless Steel Pre‑Fit Barrel (model 810‑00151‑00) is a premium, lightweight barrel assembly engineered to elevate precision and performance in custom rifle builds. Built around a match‑grade 416R stainless steel core that’s button‑rifled and CNC‑machined to exacting tolerances, this barrel combines the proven accuracy of stainless steel with the weight‑reducing and harmonic‑stabilizing benefits of an aerospace‑grade carbon fiber wrap — a technology pioneered by Christensen Arms that helps maintain consistent barrel harmonics and improve heat dissipation under fire. At 18″ in length with a 1:10″ twist rate, it’s optimized to stabilize a wide range of .308 Win loads, from hunting bullets to heavier long‑range projectiles, while keeping overall rifle weight down for easier carry and maneuverability. The barrel also comes with a thread protector installed to safeguard the threaded muzzle until you’re ready to add a brake, suppressor, or other muzzle device, making it a versatile choice for custom builders prioritizing accuracy, balance, and field readiness.