SIG Sauer NG556-QD suppressor, available from 2A Guns, a licensed FFL dealer in Henderson, NV. Buy online for pickup or FFL transfer.

Feature:

• Built in QD System: The Clutch-Lok mounting system provides a quick and secure lock up that ensures reliability and accuracy. 
• Total Signature Reduction: The NG silencers feature a flash reducing design to remain stealthy even in low-light scenarios. 
• Innovative Build Process: Additive manufacturing makes it possible to create the monolithic core for enhanced strength and reliability. 
• Sound Performance: Optimized for use on semi-auto carbines the NG556 will make your rifles sound great.

Specifications:

• Length: 7.4"
• Weight: 19.4 oz
• Build Material: Inconel
• Caliber: 5.56