B&T XH-556 RBS - 5.56mm Titanium / Inconel Suppressor - SureFire HUB Mount

B&T XH-556 RBS - 5.56mm Titanium / Inconel Suppressor - SureFire HUB Mount

Eliminate the historic compromise between lightweight maneuverability and severe-duty endurance with the B&T XH-556 RBS Titanium / Inconel Suppressor with SureFire HUB Mount. Developed by Swiss defense powerhouse Brügger & Thomet, the XH-556 represents a breakthrough in hybrid additive manufacturing, engineered specifically to master the extreme pressures, severe thermal shock, and aggressive firing schedules of 5.56 NATO / .223 Rem weapon systems. By fusing an ultra-rugged 718 Inconel blast baffle with a lightweight 3D-printed titanium chassis, B&T delivers a silencer capable of surviving relentless high-volume fire while weighing an agile 10.5 ounces in an expanded 1.75-inch high-volume footprint.

The operational centerpiece of the XH-556 is B&T’s battle-proven Reduced Backpressure System (RBS). Unlike conventional closed-baffle suppressors that force toxic gas and fouling back through the chamber, the RBS design vents expanding propellant gases forward through an engineered vortex path. This low-pressure routing restricts cyclic bolt speed increases to under 2%, preserving firearm operating components, preventing harsh ejection-port "pop," and drastically cutting gas blowback into the shooter's face. Proving its indestructible pedigree, the XH-556 has endured over 22,000 rounds of sustained SOCOM-standard burn-down torture testing without structural failure. Engineered with zero barrel length restrictions and rated for continuous full-auto fire, it features an optimized low-flash front endcap that suppresses muzzle flash and virtually eliminates the titanium spark signatures common to night-vision operations.

Built for immediate field integration, the XH-556 incorporates a universal 1.375x24 TPI HUB rear thread pattern equipped with integrated wrench flats for easy installation and maintenance. The package arrives factory-configured with the versatile Rotex-SF HUB assembly, enabling instant, rock-solid lockup onto host firearms outfitted with combat-proven SureFire SOCOM fast-attach muzzle devices—including brakes, flash hiders, and WARCOMPs—as well as B&T Rotex muzzle devices. Finished in a resilient Type 2 Anodized Gray, the B&T XH-556 RBS stands as the ultimate low-backpressure, hard-use hybrid suppressor for combat carbines and defensive modern sporting rifles.

Features

Hybrid 3D-Printed Titanium & Inconel 718 Core:
Combines a laser-sintered titanium body with an indestructible 718 Inconel blast baffle, shielding the core from high-cadence erosion while maintaining an agile 10.5-ounce total system weight.

Advanced Reduced Backpressure System (RBS):
Channels combustive gases forward through proprietary low-resistance flow paths, restricting cyclic bolt speed increases to less than 2% to minimize mechanical wear, port pop, and gas blowback.

SOCOM-Tested 22,000+ Round Endurance:
Surpassed rigorous military durability evaluations, logging over 22,000 rounds through repeated full-auto burn-down cycles without catastrophic structural fatigue.

No Barrel Length Restrictions:
Engineered without barrel length limitations, providing full-auto structural reliability on ultra-short CQB platforms, standard duty carbines, and designated marksman platforms alike.

Low-Flash Endcap & Spark Suppression:
Equipped with an advanced front aperture engineered to quell secondary combustion flame and minimize titanium sparking, safeguarding night-vision sensors and visual concealment.

Factory Rotex-SF HUB Mount Included:
Pre-configured with B&T’s Rotex-SF HUB assembly, locking up repeatably onto SureFire SOCOM-series muzzle brakes, flash hiders, and WARCOMPs as well as B&T Rotex muzzle devices.

Universal 1.375x24 TPI HUB Standard:
Machined with the industry-standard HUB interface and functional wrench flats, allowing rapid swapping to direct-thread adapters or alternative aftermarket QD systems.

Expanded 1.75″ Chassis Architecture:
Features a widened 1.75-inch diameter that drastically increases internal expansion volume, maximizing acoustic dampening while maintaining a maneuverable 7.1-inch length.

Specifications