Proof Research Ruger 10/22 Carbon Fiber Prefit Barrel 22 Long Rifle 18.5" Bull Contour 1:16" Twist 4 Groove

Overview

The Proof Research pre-fit barrel for Ruger 10/22 rifles features an 18.5-inch carbon fiber bull contour design in 22 Long Rifle with a 1:16" twist and 4-groove button rifling. Built with an aerospace-grade carbon fiber composite over a steel liner, it is up to 64% lighter than traditional steel barrels while delivering match-grade accuracy. The carbon fiber construction effectively diffuses heat along and through the barrel wall, allowing it to cool faster, maintain point-of-impact during high-volume strings, and reduce harmonic vibration. This drop-in barrel features 1/2"-28 muzzle threads and requires no gunsmithing for straightforward installation.

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