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PROOF Research offers pre-fit carbon fiber and steel barrels for the Defiance Ruckus. Installation is simple and requires only a few specialized tools. The pre-fit barrels are chambered and threaded, allowing for easy installation. After tightening the barrel to the appropriate torque, headspace can be checked with proper gauges before heading to the range. These Defiance Ruckus carbon fiber and steel pre-fit barrels offer unparalleled accuracy and performance.

The carbon fiber barrels are 64% lighter than traditional steel barrels, offering improved heat dissipation for cooler, longer-lasting barrels. They are wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin.

PROOF drop-in barrels are specifically designed for use with Defiance Ruckus, Tenacity, and Anti actions that have the "Recessed" bolt nose only, and are not compatible with actions that have cone, flat, or control round feed bolts.