Hex-2™ Buffer Tube (Hex-2)

Hex-2™ Buffer Tube (Hex-2)

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Black/ Red/ Grey / Blue

The Phase 5 Hex-2™ is our newest AR type Buffer Tube. This tube has been specifically designed to utilize the Sig Sauer™ SB15 Pistol Stabilizing Brace. The Hex-2™ is a heavy duty USA certified 7075 T7 billet aluminum buffer tube with the versatility to use the Phase 5 nitrile Foam Pad (included) or the SB15 Pistol Stabilizing brace (sold separately).

Working closely with Sig Sauer™ the Phase 5 Hex-2™ was a special project that involved a number of firearms instructors, law enforcement professionals and AR Pistol enthusiasts alike. While asking questions along the way and updating the design based on the recommendations given by all; the Hex-2™ has become the perfect component for any AR pistol build.



  • Hex-2 Buffer Tube
  • Castle Nut
  • End Plate
  • Foam Pad


In stock
Item Price: $59.95

Code: Hex-2

7.4 inches
Hex-2 CNC-machined Hexagonal aluminum Pistol buffer tube


CNC-machined 7075 T7 certified US made billet aluminum Hexagonal Pistol buffer tube

Designed to fit our Buffer Tube Foam Pad.

Tube is also designed to fit Mil-Spec carbine buffer and spring.

Hard-anodized Mil-Spec type III black finish
Hex-2 CNC-machined Hexagonal aluminum Pistol buffer tube
Hex-2 CNC-machined Hexagonal aluminum Pistol buffer tube


perfectly designed to fit the SB15 Stabilizing Brace