The Radical Defense M249 Para FVS FDE is a 5.56 NATO suppressor that measures 7.5 inches and threads on with a 9/16×24 left-hand pattern (brand part no. M249PFVS-FDE). The left-hand thread is the detail to check first, because it will not fit a standard right-hand 1/2×28 AR-15 muzzle. It is finished in Flat Dark Earth. The M249 Para in the model name refers to the host it is named for, so confirm your muzzle thread before ordering. For a shooter whose 5.56 host uses a 9/16×24 left-hand muzzle, this is a direct-fit can in tan.

Key Specifications

• Caliber rating is 5.56 NATO, the standard NATO rifle cartridge.
• Length is 7.5 inches, a rifle-size can.
• The thread is 9/16×24 left-hand, which does not fit a standard right-hand 1/2×28 AR-15 muzzle.
• The finish is Flat Dark Earth, a tan color for FDE builds.
• The suppressor threads on at the muzzle, so the host needs the matching left-hand thread.

Frequently Asked Questions

Will it fit a standard AR-15 muzzle? Not without the right thread. It uses a 9/16×24 left-hand thread, not the 1/2×28 right-hand thread found on most AR-15 barrels.

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 M249 Para FVS Suppressor, 5.56 NATO, 7.5-Inch, FDE, Left-Hand Thread

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. Check that your host is threaded 9/16×24 left-hand before you order. Order through Radical Defense‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.