Brownells government barrel assemblies, produced by a trusted US government contractor, are engineered to the highest standards for M4 barrels. Featuring a hard chrome bore over button rifling, these barrels undergo rigorous testing, including high-pressure testing, magnetic particle inspection and gauging, ensuring flawless performance. The assemblies come pre-assembled with a slip ring, non-marked front sight base and an appropriate handguard cap, tailored to the barrel length. M4 Carbine barrels include a round cap, while rifle length barrels receive a triangle cap. Made from 4150 chrome moly steel with a 5.56x45mm chamber and 1:7 twist rate, these barrels deliver optimal performance with 62 grain and heavier bullets. All components are sourced from reputable US-based partners, ensuring mil-spec quality.

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These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

WARNING: Handling firearms or firearms parts can expose you to lead and other petroleum products known to the State of California to cause cancer, birth defects, or other reproductive harm. Wash hands thoroughly after handling. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).