The Knights Armament QDSS NT-4 PRG 5.56mm NATO QD Rifle Suppressor Black (121569-BLK) is a premium, battle-proven sound suppressor designed for professional and serious civilian shooters. Manufactured by Knights Armament Company, the QDSS NT-4 PRG represents one of the most trusted and widely used 5.56mm suppressors in military and law enforcement applications. This quick-detach model features KAC’s renowned mounting system, allowing for fast and secure attachment and removal while maintaining exceptional sound suppression, flash reduction, and point-of-impact consistency.
Why Choose the Knights Armament QDSS NT-4 PRG Suppressor?
Knights Armament Company has earned a legendary reputation for producing some of the highest quality suppressors used by elite military units around the world. The QDSS NT-4 PRG is a refined version of the classic NT-4 suppressor, featuring an improved baffle design and enhanced durability. The quick-detach mounting system allows users to rapidly install or remove the suppressor without tools, making it ideal for dynamic operations or range use. The black finish provides a non-reflective, tactical appearance while offering excellent corrosion resistance. Whether mounted on an M4, MK18, SR-15, or any standard 5.56mm AR-15 platform, the NT-4 PRG delivers reliable performance, reduced muzzle signature, and the proven reliability that has made Knights Armament suppressors a top choice among professionals.
Key Features of the Knights Armament QDSS NT-4 PRG 5.56 Suppressor (121569-BLK)
- Quick Detach (QD) Mounting System – Fast and secure attachment using KAC’s proven QD mount for rapid deployment
- 5.56mm NATO Rated – Optimized for 5.56x45mm NATO and .223 Remington ammunition
- Advanced Baffle Design – Improved internal geometry for superior sound and flash suppression
- Matte Black Finish – Durable, non-reflective coating for tactical applications
- Minimal Point of Impact Shift – Maintains consistent accuracy when mounting and removing the suppressor
- Lightweight and Compact – Balanced design that minimizes added length and weight
- High-Strength Construction – Built from premium materials to withstand extreme heat and heavy use
- Battle-Proven Performance – Trusted by military and law enforcement professionals worldwide
Performance and Reliability
The Knights Armament QDSS NT-4 PRG is engineered to deliver outstanding sound reduction and flash suppression while maintaining a compact profile. The quick-detach system allows operators to attach or remove the suppressor in seconds without the need for tools, providing significant tactical flexibility. The advanced internal baffle design effectively reduces muzzle blast and visible signature, making it an excellent choice for both close-quarters and longer-range engagements.
Knights Armament’s attention to detail ensures that the NT-4 PRG maintains excellent durability even under sustained fire. The suppressor is constructed to handle the high pressures and temperatures associated with 5.56mm platforms while preserving structural integrity over thousands of rounds. The matte black finish not only provides a professional appearance but also helps reduce glare in field conditions. Whether used for tactical operations, precision shooting, or general suppressed training, the QDSS NT-4 PRG offers the performance and reliability that has made Knights Armament one of the most respected names in suppressor technology.
Technical Specifications
| Product Name | Knights Armament QDSS NT-4 PRG Suppressor |
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| Model Number | 121569-BLK |
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| Caliber | 5.56mm NATO / .223 Remington |
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| Mounting System | Quick Detach (QD) |
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| Finish | Matte Black |
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| Configuration | Rifle Suppressor |
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| Manufacturer | Knights Armament Company (KAC) |
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| UPC | 819064018742 |
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| Best For | Tactical Use, Precision Shooting, Suppressed Training, AR-15 Platforms |
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Experience battle-proven sound suppression from the industry leader.
Knights Armament QDSS NT-4 PRG 5.56mm QD Suppressor – Trusted by professionals worldwide.
The Knights Armament QDSS NT-4 PRG 5.56mm NATO QD Rifle Suppressor Black (121569-BLK) delivers exceptional sound reduction, flash suppression, and quick-detach convenience in a compact and durable package. Designed for 5.56mm platforms, this suppressor features KAC’s proven QD mounting system and a professional matte black finish. The model number 121569-BLK and UPC 819064018742 identify this specific configuration. Always ensure compliance with all applicable federal, state, and local laws regarding suppressors and firearm accessories.
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