The Radical Defense CS-5Ti FDE is a 5.56mm hub mount suppressor that runs on Radical Defense’s KFM system, finished in Flat Dark Earth (brand part no. CS5Ti-FDE). Its thread pattern is 1/2×28, the standard muzzle thread on 5.56 AR-15 barrels. The KFM system puts the suppressor on a flash hider rather than directly on the barrel, so the can mounts and comes off without unscrewing the muzzle device. The tan finish is the choice for an FDE rifle, with the same model also sold in black. It is built for the shooter who wants a 5.56 can that matches a tan build.

Key Specifications

• Caliber rating is 5.56mm, the standard AR-15 chambering.
• Mounting is through a hub mount, the interface the suppressor uses to attach to its muzzle device.
• The attachment system is KFM, Radical Defense’s flash hider mount, so the suppressor locks onto a KFM flash hider instead of the barrel threads.
• The thread pattern is 1/2×28, the standard 5.56 AR-15 muzzle thread.
• The finish is Flat Dark Earth, which separates this version from the black CS-5Ti.
• With the can locked to a flash hider, the muzzle device stays on the rifle when the suppressor is removed.

Frequently Asked Questions

How does the CS-5Ti attach to the rifle? It runs on the KFM system: a KFM flash hider threads onto a 1/2×28 muzzle, and the suppressor’s hub mount locks onto that flash hider.

Is the CS-5Ti made in other colors? Yes. This is the Flat Dark Earth version; Radical Defense also sells the CS-5Ti in black.

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.

Buy the Radical Defense CS-5Ti 5.56mm Hub Mount KFM Suppressor, FDE

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. Pair it with a KFM flash hider on a 1/2×28 muzzle and the tan can is ready to run. Order through Radical Defense‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.