Daniel Defense SG-556 SoundGuard | 1/2-28 | 06-140-04249

The Daniel Defense SG-556 SoundGuard is a direct-thread suppressor designed for use with .223 Rem and 5.56 NATO chambered firearms. It uses KGM/ SoundGuard gas-flow design and a patent-pending baffle stack to reduce impulse noise and minimize point-of-impact shift. The unit is constructed from stainless steel and ships with a HUB-standard adapter for rapid attachment and detachment.

Common applications include range training and precision/competition shooting with compatible .223/5.56 platforms.

Product Specifications

• The manufacturer is Daniel Defense.
• The model is listed as SoundGuard (SG-556).
• The UPC is 818773023320.
• The ATF model designation is SG-556.
• The ATF type is classified as Silencer.
• The suppressor is compatible with .223 Rem / 5.56 NATO.
• The thread pitch is 1/2×28.
• The NFA attachment method is Direct Thread.
• The included mounting standard is HUB 1.375-24 UNS adapter.
• The construction material for the tube and baffle stack is Stainless Steel.
• The outside tube diameter measures 1.75 inches.
• The overall length measures 7 inches.
• Country of origin is US.
• The product listing indicates the suppressor cannot be disassembled (False).

The SG-556 is built for shooters who need a rugged, repeatable mounting interface and reduced impulse noise for extended range use or precise shooting applications. Its stainless construction and HUB-compatible adapter make it straightforward to mount and remove while maintaining consistent alignment with the bore.

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