Shadow Systems HS923 Modular Direct Thread Suppressor Black x28

The Shadow Systems HS923 is a modular 9mm suppressor built for shooters who demand flexibility without sacrificing performance. This lightweight direct-thread design ships with an M13.5 x 28 threaded piston, making it immediately compatible with Shadow Systems threaded-barrel pistols and other common tilting-barrel 9mm handguns. The real innovation here is the removable baffle stack extension—run the HS923 short when you need a compact profile, or add the extension when maximum suppression is your priority. It's one suppressor, two missions.

Durability meets smart engineering in the HS923's design. A titanium blast baffle handles the heat and abuse of repeated centerfire 9mm fire, while the integrated spring-loaded Nielsen device (booster) keeps the suppressor decoupled during firing to ensure reliable cycling on Browning-type tilting-barrel pistols. The patent-pending end cap design lets you use your pistol slide as a wrench for assembly and disassembly—no special tools required, which means faster configuration changes in the field or at the range.

The included piston provides a concentric mounting interface that locks up tight and stays tight across a range of host firearms. Whether you're running this on a Shadow Systems pistol or another quality 9mm with a compatible threaded barrel, you get consistent performance and the confidence that comes with precision engineering. Lightweight, modular, and built to work—the HS923 is suppressor design that keeps up with how modern shooters actually operate.

Key Features

• Modular baffle stack extension for short or long configurations
• M13.5 x 28 threaded piston for broad 9mm host compatibility
• Titanium blast baffle for durability and heat resistance
• Integrated spring-loaded Nielsen booster for reliable cycling on tilting-barrel pistols
• Patent-pending end cap allows slide-actuated assembly—no tools needed
• Lightweight modular design
• Concentric piston mounting for secure, consistent fit

Specifications

Frequently Asked Questions

What 9mm pistols is the HS923 compatible with?

The HS923 ships with an M13.5 x 28 threaded piston and is designed for Shadow Systems threaded-barrel pistols and other common tilting-barrel 9mm handguns with compatible threading. The integrated booster is engineered specifically for Browning-type tilting-barrel actions to ensure reliable function.

Can I swap between short and long configurations?

Yes. The HS923's removable baffle stack extension lets you run the suppressor in two configurations—compact when you need a shorter profile, or with the extension installed for maximum suppression. You can switch between them as your shooting mission changes.

What comes in the box?

The HS923 includes the suppressor body with titanium blast baffle, the removable baffle stack extension, and the M13.5 x 28 threaded piston for mounting.

Do I need tools to assemble or adjust the HS923?

No. The patent-pending end cap design allows you to use your pistol slide as a wrench for assembly and disassembly, so no special tools are required.