SIG Sauer NG556-QD .223/5.56 NATO Suppressor

The SIG Sauer NG556-QD is a rifle suppressor chambered for .223 Remington and 5.56 NATO. It features an Inconel monolithic core, Clutch-Lok QD attachment system, and a flash-reducing end cap for use with compatible platforms and ammunition.

The internal multi-flow path is designed to exhaust gases more quickly than traditional baffle-style suppressors. SIG Sauer identifies the SLX design as optimized for supersonic ammunition and reports 70–80% less toxic fume flow through the ejection port compared with traditional baffle suppressors.

Key Specifications

• The compatible caliber is .223 Remington/5.56 NATO.
• The model is NG556-QD.
• The suppressor measures 7.4 inches in overall length.
• The outside diameter is 1.67 inches.
• The suppressor weighs 19.4 ounces.
• The construction uses Inconel with a monolithic core.
• The finish is black Cerakote.
• The attachment method is Clutch-Lok QD.
• The package includes a quick-detach mount/muzzle brake.
• The end cap is designed for flash reduction.

With its durable Inconel construction, repeatable quick-detach mounting system, and gas-flow-focused design, the NG556-QD provides a practical configuration for compatible .223 Remington and 5.56 NATO platforms.

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