Proof Research Carbon Fiber Barrels for Ruger 10/22 22LR actions make it easy to upgrade your rifle or change calibers. The Ruger 10/22 shouldered barrels are easy to install, with no gunsmithing required. Just thread it on, torque it down, and head for the range. The carbon fiber material used with the pre-fit barrels make everything lighter and stronger. The carbon fibers that Proof Research uses have a unique ability to diffuse heat along the length of the barrel (much like fiber optics transmit light). Carbon fiber also moves heat very effectively through the wall (thickness) of the barrel greatly increasing heat transport resulting in barrels that cool faster, maintain accuracy over longer sessions of fire, and live longer. The end result is an aerospace-grade, high-fiber content composite barrel that is stronger, lighter, as accurate as the finest precision steel barrel, and durable to perform in the most demanding environments. They're not just lighter-they'...