Our ADM Contour and Hybrid barrels, manufactured by Criterion Barrels Inc. incorporate a different production process than those used by most barrel manufacturers. The chambers and rifling of these barrels are each hand polished post-nitriding to increase the ease of barrel break-in and maintenance.
While the exterior of each barrel is bead blasted to allow for a low profile matte appearance, the breech face and internal surface texture will vary slightly from the exterior due to this polishing operation. These surfaces will typically feature a high gloss finish typical of a hand lapped match grade barrel while still incorporating the wear and corrosion resistance offered by the salt bath nitriding operation (which serves to harden the physical material properties of the steel).