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![Proof Research Carbon Fiber Lone Peak Pre-fit | 7 SAUM Proof Research Carbon Fiber Lone Peak Pre-fit | 7 SAUM](https://cdn11.bigcommerce.com/s-9544hv8ac7/images/stencil/300x300/products/482/1298/1626120697.1280.1280__69866.1626120821.1280.1280__30662.1626120900.png?c=1)
Action: Impact Precision
Caliber: 7 SAUM
Twist: 1:8.4
Contour: Sendero
Muzzle: 5/8-24
PROOF Research pre-fit carbon fiber barrels for the Defiance Ruckus actions make it easy to upgrade your rifle or change calibers. Our pre-fit Defiance Ruckus shouldered barrels are easy to install. NO GUNSMITH REQUIRED Just thread it on, torque it down, check head space, and head for the range.