PROOF Research Savage Small Shank 20" .223 Remington 1:8 Stainless Steel Pre-Fit Barrel

PROOF Research Savage Small Shank 20" .223 Remington 1:8 Stainless Steel BarrelThe factory "small shank" barrel nuts are 7/8" long. Barrel nuts measuring 5/8" long are a "large shank" and will not be compatible with PROOF Research barrels.