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Arm or Ally© teamed with three very strong barrel manufacturers to offer the finest AR barrels on the market. Ballistic Advantage, Faxon, and Rosco Barrels are manufactured in the U.S.A by hardworking men passionate about barrel-making. We stock a huge selection of barrels ready to ship right away; trust Arm or Ally© has you covered! If you need assistance selecting the best AR Barrel for your custom AR build read this article.