B&TXH-556
5.56mm / .223 suppressor · HUB 1.375x24 interface · specs and compatibility from the manufacturer
Notable features
- HUB Compatible
- No Barrel Restrictions
length
7.1″
weight
10.5oz
MSRP
$1,000
length
7.1″
weight
10.5oz
calibers
5.56
material
Titanium · Inconel
interface
HUB 1.375x24
MSRP
$1,000
- Overall length
- 7.1″
- Class
- 5.56mm / .223
- n
- 328
- Range
- 2.5″–9.75″
- Median
- 6.12″
- Diameter
- 1.75″
- Class
- 5.56mm / .223
- n
- 328
- Range
- 0.98″–2.2″
- Median
- 1.57″
- Weight
- 10.5 oz
- Material
- Titanium / 718 Inconel Insert
- Max caliber
- 5.56mm / .223
- Base interface
- HUB 1.375x24
- Front cap
- none
- Barrel restriction
- None (manufacturer stated)
- MSRP
- $1,000
Longer than most 5.56mm / .223 suppressors
Length compared against the 328 5.56mm / .223 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Wider than most 5.56mm / .223 suppressors
Diameter compared against the 328 5.56mm / .223 suppressors in the catalog that publish one. Quartile basis; a value inside the middle half carries no note.
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
- Base interface
- HUB 1.375x24
- Front cap
- none
The HUB 1.375x24 is an open standard: 415 mounts and 818 muzzle devices in our catalog fit this suppressor, including B&T Direct Thread HUB Lightweight Adapter (1/2x28), AAC 51T S.T.A.M.P. Mount and AB Suppressor AB Raptor Adapter. You aren't locked into one manufacturer's parts.
Which ones fit your barrel and host?
Check in the BuilderManufacturer claim
- Reduced Backpressure System (RBS): Limits bolt speed increase to under 2%, preserving weapon health and operator comfort.
- Low-Flash Endcap: Minimizes visible signature, critical for stealth and situational clarity.
- User-Friendly Mounting: HUB interface options (1.375×24 TPI) and wrench flats simplify attachment or removal across multiple rifle systems.
- The XH-556 raises the bar for cutting-edge suppressor design, specifically tuned for the increased pressures associated with 5.56 / .223 firearms.
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- Leveraging B&T’s Reduced Backpressure System (RBS) alongside a low-flash endcap, the XH-556 offers an innovative answer to the dual challenges of gas blowback and muzzle signature often encountered in other reduced-backpressure setups.
- Hybrid 3-D Printed Design: Lightweight titanium body for easier handling, plus a robust Inconel blast baffle to withstand superheated gases.
- Weldless Construction: Eliminates traditional weak points, improving reliability over extended shooting sessions.
- By combining a 3D printed titanium with a 718 Inconel blast baffle, it delivers a strategic balance of lightweight handling and advanced flash suppression—perfect for high-round-count, high-heat scenarios.
- No Barrel Length Restrictions: Engineered for full-auto use and ensures flexibility across firearm platforms.