The Radical Defense CS-5Ti Black is a compact 5.56mm suppressor built on a hub mount and sold with a KFM flash hider threaded 1/2×28 (brand part no. CS5Ti). The flash hider threads onto the barrel, and the suppressor locks onto it, which keeps the can easy to put on and take off. Radical Defense lists the CS5TI as a compact model, sized for carbines and short-barreled rifles that should stay handy with a suppressor attached. This version is black, the usual match for an AR-15. It is a compact, complete package for a 5.56 rifle with a standard muzzle thread.

Key Specifications

• Caliber rating is 5.56mm, the chambering most AR-15 carbines use.
• The body is a compact design, keeping a short 5.56 rifle balanced and maneuverable.
• Mounting is through a hub mount, which locks the suppressor onto its flash hider.
• A KFM flash hider comes with the suppressor, so no separate mount has to be bought.
• The flash hider is threaded 1/2×28, the standard 5.56 AR-15 muzzle thread.
• The finish is black, the common match for AR-15 receivers.
• Because the suppressor rides on the flash hider, the flash hider stays in place when the can comes off.

Frequently Asked Questions

What comes with the CS-5Ti? The suppressor is sold with a KFM flash hider threaded 1/2×28, which is the part the suppressor mounts to.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Is this the black or FDE CS-5Ti? This is the black CS-5Ti. A Flat Dark Earth version is sold separately.

Buy the Radical Defense CS-5Ti Compact Suppressor, 5.56mm, Hub Mount, Black

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. The KFM flash hider in the box means a 1/2×28 barrel is the only thing your rifle needs. Order through Radical Defense‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.