Sig Sauer HEXIUM556 | 5.56 NATO Titanium Suppressor

The SIG SAUER HEXIUM556 is a compact, direct-thread suppressor engineered for low back pressure and consistent sound signatures on 5.56 NATO platforms. It uses an additive-manufactured core and a hub taper direct-thread attachment to deliver modularity and straightforward mounting. The unit’s titanium construction and black Cerakote finish balance weight savings with corrosion resistance. Designed for range training and precision shooting, the HEXIUM556 fits applications where repeatable performance and reduced muzzle blast are priorities.

Product Specifications

• The manufacturer is Sig Sauer.
• The model is Hexium (ATF Model HEXIUM556).
• The UPC is 798681731671.
• The listed caliber is .223 REM/5.56 NATO.
• The material is Titanium.
• The finish is Black Cerakote.
• The overall length measures 6.2 inches.
• The diameter measures 1.75 inches.
• The weight is 11 oz.
• The thread pattern is 1/2-28.
• The attachment type is a Hub Taper Direct mount.
• The NFA attachment method is listed as Direct Thread.
• The product type is listed as a Suppressor.
• The ATF manufacturer is SIG SAUER INC.
• The unit includes a 3D printed titanium core and an end cap accessory mounting system.

The HEXIUM556 combines a lightweight titanium core with a hub taper direct-thread interface to deliver manageable weight, straightforward attachment, and modular end-cap options. Its design focuses on minimizing back pressure while providing consistent tone across common 5.56 NATO platforms. For shooters who prioritize low mass and repeatable performance during extended range sessions or precision work, the HEXIUM556 offers a practical, well-engineered option.