The Shadow Systems HS923 (brand part no. SS-9000) is a modular 9mm suppressor finished in black, built for pistol caliber use. Shadow Systems designs the HS923 for shooters who want a modular can from a manufacturer known for its pistol platforms. The HS923 favors 9mm pistol shooters who want a modular suppression option.

Key Specifications

• Chambered for 9mm pistol cartridges.
• Uses a modular design.
• Finished in black.
• Mounts via a 1/2×28 threaded piston, standard on threaded-barrel Shadow Systems pistols.

Frequently Asked Questions

Is this an NFA item? Yes. As a suppressor, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber is it rated for? 9mm.

How does it mount? It uses a 1/2×28 threaded piston mount, standard on every threaded-barrel Shadow Systems pistol. That’s a direct-thread mount, not quick-detach.

Buy the Shadow Systems HS923 Modular Suppressor

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4 and transfer through a licensed NFA (SOT/Class 3) dealer, with no federal transfer tax and an extended federal approval wait before delivery. Order through Shadow Systems‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.