The Sig Sauer NG556QD SLX is a 5.56 NATO rifle suppressor designed for use on semi-automatic carbines. It features a monolithic core constructed from Inconel and a Clutch-Lok quick-detach mounting system for repeatable attachment. The design emphasizes reduced toxic fume exposure and a flash-reducing end cap for lower visible signature during routine use.

Key Specifications

• The caliber is .223 REM / 5.56 NATO.
• The attachment system is Clutch-Lok QD (quick-detach).
• The construction material is Inconel.
• The finish and color are Cerakote black.
• The overall length measures 7.4 inches.
• The weight is 19.4 oz.
• The outside diameter is 1.67 inches.
• The NFA thread pattern is 1/2×28.
• The core is a monolithic Inconel core (additively manufactured).
• Additional features include a flash-reducing end cap.

Built to provide low-tox performance and durable service life, the NG556QD SLX pairs an additively manufactured monolithic core with Sig Sauer’s Clutch-Lok quick-detach system to deliver consistent attachment and reduced backflow of gases. Its compact footprint, flash-reducing end cap, and robust Inconel construction make it suitable for users seeking a durable suppressor solution for use on semi-auto carbines while minimizing audible and visual signature in everyday operational contexts.