![]() ![]() ![]() The hardness ratings of each type are the same, and while each alloy does include chrome, it is not a large enough amount eliminate rust forever.Ĥ16R Stainless Steel is also commonly used in AR barrels and it has more chrome, making it more corrosion resistant. AR barrels are usually made from 4100-grade Chrome Moly steel alloy, most commonly 4140 - which can be cheaper - or 4150 which includes Vanadium in the alloy to increase strength.
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