The Daniel Defense SG-556 SoundGuard is a direct-thread suppressor designed for use with .223 Rem / 5.56 NATO firearms. It attaches via the included 1/2×28 adapter and employs KGM gas-flow technology to reduce impulse noise and minimize backblast. The suppressor uses a stainless steel baffle stack and tube to provide durability for regular use.

Key Specifications

• The suppressor is compatible with .223 Rem / 5.56 NATO calibers.
• The NFA thread pitch is 1/2×28 TPI.
• The overall length is 7 inches.
• The outer diameter measures 1.75 inches.
• Construction uses a stainless steel baffle stack and tube.
• Mounting is via an included adapter using the HUB standard 1.375-24 UNS.
• Model designation is SG-556 SoundGuard by Daniel Defense.
• The suppressor is Full Auto Rated.
• The ATF classification is listed as Silencer.
• Country of origin is the U.S..

Engineered for reliable field use, the SG-556 SoundGuard pairs KGM flow dynamics and a patented baffle stack to reduce impulse noise, limit muzzle flash, and stabilize rounds with minimal point-of-impact shift. Its direct-thread adapter system allows fast attachment and removal while keeping added length to a minimum, making it a practical option for owners of compatible .223/5.56 platforms who prioritize durability and consistent performance.