Knight’s Armament QDSS-NT4 PRG 5.56 Rifle Suppressor


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KAC PN 121569-BLK and 121569-FDE

The next generation brother of the legendary brick shithouse that redefined what durability really is

After purchasing, please have your local store email their FFL and SOT to along with your name and order number

Product price: $1,776.00
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Knight’s Armament QDSS-NT4 PRG 5.56 Rifle Suppressor

This is a next generation update to KAC’s legendary NT4 suppressor — now 3D printed with less backpressure

KAC PN 121567-BLK & 121567-FDE

The QDSS-NT4 suppressor has been providing continuous service to the US Military dating back to the mid-1990s and has established itself as a legendary icon. Mounts to a M4QD flash hider, M4QD MAMS or Triple Tap compensator. Available in Black and Flat Dark Earth (-BLK) (-FDE).

Addition to Bare Muzzle: 5.88″ (15cm)
Addition to M4QD FH: 4.63″ (11.8cm)
Overall Length: 6.75″ (17.2cm)
Weight: 19.75oz (560g)
Sound Reduction: 28dB

This is a regulated item and requires shipment to a FFL/SOT holder. After you have placed your order, please have your order number and a copy of your preferred store’s FFL/SOT emailed to to avoid delays. After I have received their FFL/SOT, I will file a Form 3. Upon approval, I will ship your order as soon as possible!

Click here to browse our entire selection of Suppressors.

Additional information


Black, Taupe


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