The CGS STI Six (brand part no. CGSSTISIX) is a 5.56mm-rated suppressor built from titanium for AR-platform shooters. CGS Suppressors designed the STI Six as a lightweight titanium can for durable, sustained field use. The STI Six favors 5.56-platform shooters who want a titanium suppressor from a purpose-built NFA silencer manufacturer.

Key Specifications

• Rated for .223 Rem/5.56 NATO for AR-platform sound suppression.
• Built from titanium for a lightweight, durable construction.
• Mounts via a quick-detachable 1/2×28 interface.

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 is it made of? Titanium.

How does it mount? A quick-detachable 1/2×28 mounting interface. No tools needed to attach or remove once the mount is installed.

Buy the CGS STI Six Suppressor

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