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The Phase 5 Hex-2-C takes the guesswork out of finishing an AR pistol build. It starts with that signature hexagonal profile up front and transitions to a rounded rear section, which is the part that lets it work with SB Tactical stabilizing braces that call for a 1.2" round tube. Machined from USA-certified 7075-T7 billet aluminum, this thing is built to take a beating and keep running clean.
Where the Hex-2-C really earns its spot is versatility. Right out of the box you can run the included 3.5" nitrile foam pad for a slick, comfortable setup, or swap over to a fixed SB Tactical brace like the SB15 down the road. That nitrile foam resists oil and solvents and holds up across a wide temperature range, so it stays put whether you're at the range in summer or out in the cold.
This is a complete assembly, not just a bare tube. You get the Hex-2 buffer tube, a Mil-Spec castle nut, an end plate, a carbine buffer, the Phase 5 enhanced buffer spring, and the foam pad. That covers everything you need to button up the rear of your lower without hunting down small parts separately. It measures roughly 7.4" long and tips the scales around 11.5 ounces.
One thing worth flagging: the Hex-2-C is designed around fixed braces and non-adjustable setups. It is not made to work with adjustable brace models like the SBA3, SBA4, or PDW, which need a different mounting system. If your build calls for a clean, rock-solid fixed configuration with a snug brace fit and no wobble, this is a smart pick. The billet construction and Phase 5 spring give it a step up over a bargain-bin kit, and it installs on any standard AR-15 lower using the tools you'd already reach for.
No. The Hex-2-C is built for fixed SB Tactical braces that accept a 1.2" round tube, so it is not compatible with adjustable models like the SBA3, SBA4, or PDW. Those braces use a different mounting setup that this tube's profile won't accommodate. If you want an adjustable brace, you'll need a tube designed specifically for it.
It's a complete assembly. Along with the Hex-2 buffer tube you get a castle nut, end plate, carbine buffer, the Phase 5 enhanced buffer spring, and a 3.5" nitrile foam pad. That means you have everything needed to finish the back end of your AR pistol lower without buying extra small parts.
Yes. The included nitrile foam pad slides right over the round rear section for a clean, comfortable setup if you're running it slick. The nitrile material resists oil and solvents and holds up across a wide temperature range, so it's a solid option whether or not you add a brace later.
It's machined from USA-certified 7075-T7 billet aluminum with a black anodized finish. That's a strong, corrosion-resistant material that stands up well to hard use. The tube fits standard Mil-Spec carbine buffers and springs and installs on any standard AR-15 lower.
| UPC | 813318020284 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | HEX2C |
| Product Type | Buffer Assembly |
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