CMC’s Match Precision Barrels are the ultimate upgrade drop-in barrels for Gen 3 & 4 Glock® 17,19 and 34 Pistols. Our Match Grade barrels are precision machined from Certified, DFARS compliant; pre hardened 416R premium grade stainless steel, to extremely tight tolerances and exacting details. 416R stainless steel is recognized for its corrosion resistance, maintainability, and high tensile strength; it is the industry standard for premium Match Grade barrel manufacturing.