Proof Research Barrel

Proof Research 6.5CM Lone Peak Pre-Fit Steel Barrel

Proof Research 6.5CM AR Type Steel Barrel

Proof Research 6.5 PRC Impact Precision Pre-Fit Carbon Fiber Barrel

Proof Research 6.5 CM Defiance Ruckus Pre-Fit Carbon Fiber Barrel

Proof Research 6 GT Zermatt Arms Pre-Fit Steel Barrel

Proof Research 6 ARC Zermatt Arms Pre-Fit Carbon Fiber Barrel

Proof Research 6.5 Grendel AR Type Carbon Fiber Barrel

Proof Research 6.5 CM Tikka Pre-Fit Carbon Fiber Barrel

Proof Research 6.5 CM Barrett MRAD Carbon Fiber Pre Fit Barrel

Proof Research 6.5 CM Accuracy International Pre-Fit Steel Barrel

Proof Research 6 GT Terminus Pre-Fit Steel Barrel

Proof Research 6 GT Defiance Ruckus Pre-Fit Steel Barrel