Knights Armament 556 QDC

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Availability: Out of stock

Our Price: $1,432.00

* This item qualifies for Easy Pay Help

Initial down payment of $400.00.
4 payments of $326.02 to be paid over the next 4 months (1 payment due each month) to pay the remaining balance.
Total to be paid = $1,704.08
* Final total varies depending on tax, shipping, and BATFE transfer fees that may apply to the order.
* 19% service fee applies for the use of Easy Pay.

Quick Overview


The Knights Armament 5.56 QDC (Quick Disconnect Coupling) suppressor provides both effective flash and sound suppression, with minimal backpressure.  The KAC QDC features a consistent and minimal point of impact shift, removing any need to re-zero the rifle between mounting and unmounting.  Inconel and stainless steel construction allows the Knights 5.56 QDC to be durable enough for full-auto fire and prolonged use on short barrel rifles.  

Knight's suppressors are available in black and flat dark earth (FDE) cerakote colors. 


Like it's NT4 and QDC CQB brothers, the 5.56 QDC from Knight's Armament has been proven to withstand the rigorous, real-world test by the United States military and law enforcement agencies across the country.  The 5.56 QDC is ideal when looking for maxim suppression and flash reduction when mounted to Knight's QDC muzzle devices.  



  • 6.5" long
  • 16.7 ounces
  • Full-auto rated
  • Quick Disconnect Coupling mounting system
  • Available in Black and Flat Dark Earth

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Caliber .223, 5.56mm
Weight 18.0000
Length 6.69
Diameter 1.475
Decibel Reduction / Output 29dB
Full Auto Rated Yes
Mount No
Thread Pitch What thread pitch do I have? No
Finish Cerakote
Materials Stainless Steel / Inconel
Can Be Disassembled No
Manufacturer Knights Armament (KAC)
Warranty No
Model No
Manufacturer's Suggested Retail Price $1,432.00

The Knights Armament 7.62 QDC/CQB suppressor provides suppression in an ultra short package. The idea behind the QDC / CQB is to keep the overall length of your firearms at a bare minimum while providing effective flash and sound suppression. Consistent and minimal point of impact shift is obtained using KAC's advanced QDC (quick disconnect coupling) mounting system that is also used on their larger 7.62 QDC suppressors.

Knight's suppressors are available in black and flat dark earth (FDE) cerakote colors. A muzzle device is optional at the time of purchase and required for use.


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