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OSS HUXWRX HX-QD 556K Suppressor

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DELIVERY: Agencies & Dealers, 3 to 10 Days. Civilians, please allow 30+ days for delivery for NFA transfers. Your card will be charged when the order is received. There will be a 50% restocking fee if you cancel your order.
5.00 LBS
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Now: $499.98
Was: $849.98

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Product Close Out: Purchase a OSS HX-QD 556K (Gen 1)
OSS is the first company to successfully design a flow through suppressor. There are many benefits to using a suppressor of this type. These advantages show up predominantly on gas operated firearms such as AR-15s or AR-10s. The first time that you use OSS you will notice that you don't have to deal with an uncomfortable amount of high pressure gas blowback and carbon in your face. The reason for this is that these suppressors don't use traditional baffles that create a massive amount of pressure in the tube. Comparatively, this design reduces the cycling speed of your DI or piston driven gun as well. This means you don't have to replace parts and tune your rifle specifically to you silencer. Because of the rotation of the gas through the core you never have to worry about sending your can down range again. Every shot helps to keep the suppressor on. As an effect of this, extra material could be added to areas that needed it, thus why OSS HX-QD 556K suppressors have no minimum barrel requirement. If you are tired of not being able to see whenever you want to shoot your gas gun suppressed you should give OSS a chance. 
  • Flow through baffle design 
  • No barrel length minimum 
  • Passes USSOCOM reliability test
  • Vastly reduces blowback when compared to standard baffle silencers 
  • Only increases carrier speed by 3-5% as opposed to 20-35%
  • Fully welded design
  • OSS suppressors self tighten
  • Brake and suppressor have LH threads
  • 17-4 heat treated stainless steel
  • Cerakoted Black


Suppressor mount not included.

Sound Pressure Levels:  The HX-QD 556 is the optimal choice for the widest range of 5.56 caliber rifles.  Sound pressure levels are measured at the shooters ear to comply with current military 



  • 136 – 140 dB on 20” AR15 DI using 55 gr ammo
  • 138 – 142 dB on 16” AR15 DI using 55 gr ammo
  • 142 – 146 dB on 10.5” AR15 DI using 55 gr ammo 
  • Weight: 15.5 oz.
  • Length: 5.7 in.
  • Diameter: 1.6 in.

WARNING This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to You must be 18+ years old to shop and or purchase on our website and 21+ to purchase Ammunition/Firearms. Check local laws before ordering as you certify you are of legal age and satisfy all federal, state, and local legal/regulatory requirements. There are NO returns or exchanges on armor, firearms, ammunition, PPE equipment. Ammo ships UPS ground to the lower 48 states.
We reserve the right to fix any critical errors.

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