HUXWRX FLOW 556K Suppressor with QD 1/2x28 Flash Hider - Black

Manufactured by Huxwrx
SKU: 2449
MPN: 2449
Manufactured by Huxwrx
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Items that are regulated by the ATF and NFA have restrictions and requirements: •Your Entire Order will ship only to a Federal Firearm License holder •NFA restricted items require class 3 licensing and documentation •A copy of your order/invoice as well as the current FFL License for your local dealer must be emailed to ffl@primaryarms.



The HuxWrx Flow 556K leads the market with its patented Flowthrough® and Torque Lock™ design. Known for being the first 3D printed flow-through suppressor, the Flow 556K is printed in 17-4 stainless steel for ultimate durability with a remarkable 10,000 to 20,000 round service life threshold. The Flowthrough® helical coil and core deflector allow the Flow 556K Suppressor to mitigate toxic fume exposure, flash reduction, sound reduction, and recoil reduction to produce more accurate and repeatable shots. Torque Lock™ technology uses the same pressure of gas exiting the device to torque the suppressor and keep it snug on the rifle. This means to the user that no tools are necessary to attach and remove the Flow 556K suppressor. This model has been full-auto-rated for 5.56. 17 HMR, and 5.7 platforms and has passed the USSOCOM Reliability Stress Test. Included with the suppressor is a QD 556 1/2x28 Flash Hider.

  • 3D Printed Flow-Through Suppressor
  • Multi-Caliber Compatible
  • 17-4 Stainless Steel
  • 1/2x28 Thread Pattern
  • C-Series Cerakote Black Coating
  • Passes 6 SOCOM Reliability Stress Test Cycles
  • Average 143 dB at shooter's ear
  • Average 18 dB reduction
  • 4.9" length added to the barrel
  • 3.8" length added to the muzzle device
  • Diameter: 1.6"
  • Overall Length: 5.5"
  • Weight: 11.8 - 12.9 oz.
  • Service life: 10,000 rounds threshold with objective 20,000 rounds
  • Includes QD 556 1/2x28 Flash Hider

Thirteen years ago, HuxWrx, then known as OSS, introduced the first Flowthrough® suppressor system that provided a fire suppression system that didn't adversely affect the weapon. Since that time, Flowthrough® technology has disrupted the suppressor industry and has become a gold standard for professionals globally. Although safety and blowback suppression has always been a primary focus, OSS realized that Flowthrough® technology reduced the toxic blowback of traditional baffle-style suppression systems by well over two hundred percent. In 2021 the focus of OSS shifted, and the decision to change identity and name to HuxWrx took place. Today, HuxWrx is a human-exposure company that focuses on building products optimized to protect the safety and health of its product users.
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Baffle Material17-4 PH Stainless Steel
Baffle StyleFlow Through
Body Material17-4 PH Stainless Steel
Caliber Gauge5.56 NATO
Diameter1.6 in.
Full Auto RatedFull Auto Rated
Length5.5 in.
Suppressor MountHUXWRX Torque Lock
Thread Pattern1/2 X 28
User ServiceableNon-Serviceable
Weight11.9 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

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