Zev Dimpled Barrel,

Match Grade drop-in barrels feature extremely tight tolerances and are manufactured with pre-hardened chromium stainless steel (416R) that was originally designed for use in Match Grade rifle barrels. This material provides high tensile strength and toughness to withstand typical chamber pressures while still being highly corrosion resistant. Every barrel is double honed (rough and finish) until a minimum surface finish of 16 RA is reached. During this process the barrels are held to a final dimension of +/- 0.0002 inch for consistency and accuracy. Barrels are cut rifled and 100% inspected for groove dimensions and broach finish.