The SIG Sauer SURG 5.56mm suppressor (SIG Sauer part no. SURG556) comes from SIG Sauer winning the SOCOM Suppressed Upper Receiver Group contract. It is an Inconel high-flow design built on the Forward-Flux multi-flow path, which reduces gas blowback and fouling so the shooter keeps a clear sight picture. A detachable titanium hexagonal heat shield covers the body, and an integrated flash hider sits at the muzzle end. It threads directly onto a 1/2×28 barrel. It suits a hard-running 5.56 rifle that sees long strings of fire.

Key Specifications

• The caliber rating is 5.56 NATO, for AR-15 and other 5.56mm rifles.
• The overall length is 7.3 inches, which sets how far the rifle extends past the muzzle.
• The weight is 23.8 ounces with the heat shield on, the full carry weight of the assembled can.
• The weight drops to 20.5 ounces with the shield off, for builds that do not need the shield.
• The core is Inconel, a nickel-based alloy that holds up to heat.
• The mount is direct thread, so it threads straight onto the barrel with no quick-detach muzzle device.
• The thread is 1/2×28, the common 5.56 barrel pattern to match against your muzzle.
• An integrated flash hider sits at the muzzle end, so no separate flash hider is needed.
• The detachable titanium hexagonal heat shield lowers the thermal signature and helps prevent burns on contact.
• The Forward-Flux multi-flow path reduces gas blowback and keeps the firearm cleaner.

Frequently Asked Questions

Does the SURG come with a heat shield? Yes. It is shielded by a detachable titanium hexagonal heat shield, and it weighs 23.8 ounces with the shield on and 20.5 ounces with it off.

What thread does the SURG use? It is a direct-thread suppressor with a 1/2×28 thread, so it mounts straight onto a matching threaded barrel.

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 SIG Sauer SURG 5.56mm Suppressor, 1/2×28 Direct 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. Order through SIG Sauer‘s suppressors lineup and our Lubbock, Texas team will handle the transfer and it ships fast to your Class 3 dealer.