Brand: Ruger
Model: AR Buffer Tube Kit / Complete Carbine Buffer Tube Assembly
Firearm Fit: AR-15 / M4 platform receivers
Style: Carbine
Positions: 6-Position adjustable
Buffer Weight: Carbine standard
Material: 7075-T6 Impact extruded aluminum ; High-tensile steel
Finish: Matte black hardcoat anodized ; Phosphate coated
Diameter: Mil-Spec diameter
Length: 7.25 inches / 13.90 inches
6-Position Mil-Spec Receiver Extension
Carbine Recoil Buffer
Carbine Buffer Spring
Standard Castle Nut
Receiver End Plate

Features

Complete your AR-15 lower receiver with the Ruger AR Buffer Tube Kit, a factory-branded assembly designed for dependable fit, function, and long-term durability. This kit includes the essential rear receiver components needed for a carbine-style buffer system, making it a practical option for new builds, repairs, or replacement projects. The kit features a Ruger buffer tube, carbine buffer spring, buffer, castle nut, and receiver end plate. Together, these components provide the foundation for reliable cycling and secure stock installation on compatible AR-15-pattern firearms. Built to Ruger’s standards for rugged performance, this buffer tube kit is ideal for builders and shooters who prefer factory-quality components from a trusted firearm manufacturer. Compatibility may vary among AR-15 manufacturers and individual firearm configurations. Installation by a qualified gunsmith is recommended to ensure proper fit, function, and safety.

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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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