Proof Research 138687 308 Win 16.5" 1:10 Twist 5/8x24 Rifle Barrel - Threaded

The Proof Research 138687 is a precision .308 Winchester rifle barrel measuring 16.5 inches long with a 1:10 twist rate. Built by Proof Research, a manufacturer recognized for high-performance precision barrels, this threaded barrel features 5/8x24 muzzle threading to accept standard .308 Win muzzle devices and sound suppressors.

The 1:10 twist rate is well-suited to a broad spectrum of .308 Winchester bullet weights, stabilizing the common hunting and match projectiles used in this chambering. At 16.5 inches, the barrel offers a compact profile that retains the velocity needed for effective downrange performance.

Proof Research barrels are produced to exacting tolerances for accuracy and concentricity. The 5/8x24 muzzle threading is the industry-standard pattern for the .308 Winchester chambering, allowing straightforward installation of muzzle brakes, flash hiders, or suppressors.