Daniel Defense SG-556 SoundGuard Suppressor 1/2-28, .223/5.56

The Daniel Defense SG-556 SoundGuard is a direct-thread suppressor intended for .223 Rem / 5.56 NATO platforms. It is constructed with a stainless steel tube and baffle stack, attaches via a 1/2-28 TPI direct thread and ships with a HUB-standard 1.375-24 UNS adapter for rapid mounting. The design emphasizes reduced impulse noise and reduced flash signature while maintaining minimal point-of-impact shift.

Built to be durable without excessive weight, the unit is finished in black and is made in the U.S.A. The suppressor is stamped with the Daniel name and is supplied with the mounting adapter and a flat wrench for attachment and removal.

Key Specifications

• The suppressor is compatible with .223 Rem / 5.56 NATO calibers.
• The thread pitch for direct attachment is 1/2-28 TPI.
• The included mounting standard is HUB 1.375-24 UNS via the supplied adapter.
• The overall length measures 7 inches.
• The weight (with mount) is 22 oz.
• The outside tube diameter is 1.75 inches.
• The construction material is stainless steel for tube and baffle stack.
• The finish is listed as black / matte.
• The suppressor uses KGM-powered gas-flow dynamics and a patent-pending baffle stack to reduce impulse noise and flash signature, supporting minimal point-of-impact shift for accuracy.
• The ATF model designation is SG-556 and the ATF type is listed as Silencer.

The SG-556 SoundGuard provides a robust, repeatable mounting system and durable stainless-steel construction for users who prioritize a balance of noise reduction, low flash, and serviceable weight. Its HUB-style adapter and 1/2-28 direct-thread compatibility make it straightforward to fit to common .223/5.56 platforms while maintaining attention to accuracy and handling characteristics.

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