Phase 5 HEX2C Hex-2 Buffer Tube Assembly — Black Aluminum

The Phase 5 Hex-2 buffer tube is a purpose-built AR pistol component that begins with a hexagonal profile and transitions to a rounded rear section. Machined from 7075 T7 billet aluminum, the Hex-2 was designed to accept SB Tactical pistol stabilizing braces that require a 1.2″ round buffer tube; it is not compatible with adjustable brace models such as the SBA3, SBA4, or PDW. The Hex-2-C Complete Package ships with a 3.5″ nitrile foam pad, carbine buffer, Phase 5 enhanced buffer spring, castle nut, and end plate, providing the core hardware frequently used in AR pistol builds. Its heavy-duty construction and accessory integration suit builders focused on durability and straightforward brace compatibility.

Key Specifications

• The tube is machined from 7075 T7 billet aluminum for high strength and durability.
• The finish is black over aluminum as noted in the product title.
• The design features a hexagonal forward section that transitions to a rounded rear portion to accommodate compatible braces.
• Designed to accept SB Tactical pistol stabilizing braces that fit a 1.2-inch round buffer tube.
• Not compatible with adjustable brace models like SBA3, SBA4, and PDW.
• The Hex-2-C package includes Hex-2 buffer tube, castle nut, end plate, 3.5″ nitrile foam pad, carbine buffer, and Phase 5 enhanced buffer spring.
• Product type is Buffer Assembly.
• Intended for AR pistol platform builds and brace-equipped configurations.

Built for builders who want a stout, no-nonsense component for AR pistol platforms, the Phase 5 Hex-2 combines billet construction with practical accessory inclusion. The complete package simplifies installation and provides a robust foundation for brace-compatible builds where strength and straightforward compatibility are priorities.