Knight’s Armament - QDSS-NT4 PRG 5.56 Rifle Suppressor - Black - 121569

The Knight's Armament QDSS-NT4 PRG 5.56mm Rifle Suppressor — Black (KAC PN: 121569) is KAC's QDSS NT-4 PRG (Prong) suppressor for 5.56mm rifles equipped with the KAC 3-Prong QDC muzzle device (PN: 30555). The NT4 PRG features NT4 Gate Latch Connector technology for secure attachment to KAC prong-style muzzle devices. With an overall length of 6.4" and a 19.8 oz weight, the QDSS NT4 PRG delivers 134 dBA SPL at the ear and 139 dBA at 1m — quieter than the standard NT4. Available in Black and FDE.

• Part Number: 121569 (Black: 121569-BLK)
• Caliber: 5.56mm NATO / .223 Remington
• Overall Length: 6.4" (16.3cm)
• Addition to Bare Muzzle: 5.9" (15cm)
• Weight: 19.8 oz (561.3g)
• Sound Level (1m Left): 139 dBA
• Sound Level (at Ear): 134 dBA
• Attachment System: NT4 Gate Latch — KAC 3-Prong QDC muzzle device (PN: 30555)
• Color: Black
• Manufacturer: Knight's Armament Company (KAC), Titusville, Florida, USA

⚠️ NFA Regulated: This suppressor is a National Firearms Act (NFA) item. A $200 ATF tax stamp (Form 4) is required. Must be transferred through a licensed Class III/SOT FFL dealer.