Knights Armament QDSS-NT4 PRG 5.56 Rifle Suppressor


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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


ITAR Notice
All NFA Rules apply

    Export of the commodities described herein is strictly prohibited without a valid export license issued by the U.S. Department of State, Office of Defense Trade Controls, prescribed in the International Traffic in Arms Regulation (ITAR), Title 22, Code of Federal Regulations, Parts 120-130.



This is a regulated item. Federal law requires us to ship it to an FFL (Federal Firearms Licensee) in your state of residence.

After you have placed your order, you will receive a confirmation email. Please reply to that email with the name and contact info of your FFL. (or email it to:  and include your order number.)

You can put any address you want at checkout. We will change it prior to shipment.

Additional information

Weight 161 oz
Dimensions 12 × 6 × 6 in



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