The Radical Defense LS5Ti FDE is the titanium 5.56mm rifle suppressor in Flat Dark Earth (brand part no. LS5Ti-FDE). It is the lightweight build of the LS5, made from Ti64 and weighing 16.0 ounces against 24.0 ounces for the Haynes 282 version. Radical Defense’s Breathable Technology stabilizes internal pressure to cut blowback, and the monolithic body is built for salt air and prolonged fire. It mounts on a 1.375-24 hub interface with a KFM flash hider threaded 1/2×28, the standard AR-15 muzzle thread. For an FDE carbine that gets carried more than it sits on a bench, this is the tan, light option.

Key Specifications

• The caliber rating is 5.56mm, the standard AR-15 chambering.
• Weight is 16.0 ounces, noticeably lighter than the steel LS5 at 24.0 ounces.
• The material is Ti64 titanium, the alloy that makes the weight saving possible.
• Length is 7.5 inches, a size that suits carbines and rifle-length hosts.
• Diameter is 1.75 inches, the tube size to check against your handguard.
• The attachment is a 1.375-24 hub mount, the rear interface that locks the suppressor to its muzzle device.
• The muzzle device is a KFM flash hider threaded 1/2×28, the standard 5.56 AR-15 muzzle thread.
• Gas management is Breathable Technology, which reduces blowback and back pressure.
• The body is monolithic, built to resist heat, corrosion and salt air.
• The finish is Flat Dark Earth, a tan color for FDE rifles.

Frequently Asked Questions

How much lighter is the LS5Ti than the LS5? Radical Defense lists the titanium build at 16.0 ounces and the Haynes 282 build at 24.0 ounces.

What mount does the LS5Ti use? A 1.375-24 hub mount. A KFM flash hider threaded 1/2×28 goes on the muzzle, and the suppressor locks onto it.

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 LS5Ti Suppressor, 5.56mm, Titanium, 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. The titanium build and tan finish make it an easy match for a lightweight FDE 5.56 carbine. 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.