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Shop accurate and affordable AR-15 barrels manufactured and sold by MCS. You may want to further customize your AR-15 upper, rifle, or pistol and with our AR-15 barrels available in various lengths, finishes, gas system lengths, and fluting styles, you can do just that. We offer a wide variety of profiles for your individual needs including M4, heavy barrels, SOCOM, and government profiles. MCS barrels are made with the finest 4150 Chrome Moly Vanadium or 416R Stainless Steel and button rifled for maximum accuracy! Perfecting each stage in the barrel manufacturing process is vital for accuracy and durability which is why all our barrels undergo rigorous human and machine inspections before shipping from our factory to your door. Buy your next AR-15 barrel today and experience high performance at a great price! And to learn everything there is to know about AR-15 barrel types or AR-15 barrel length, check out our informative and complete guides.