The BLACKHAWK! Knoxx replacement COMMERCIAL adjustable buttstock is a polymer constructed M4 style stock. Designed for quick and easy adjustment it features a 1”; preinstalled quick-detach sling swivel. Comprised of a durable polymer, the Knoxx is a great replacement for your current commercial stock.

*This stock is intended for commercial buffer tubes with a 1.170 diameter. Mil-Spec buffer tubes (1.146”; diameter) will not allow proper fitment.

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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.

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