This is a NFA item and requiers a tax stamp. We can only ship to class 3 dealers.

HUXWRX, formerly known as OSS Suppressors, released their first consumer 3D printed 5.56 suppressor called the FLOW 556K. An innovation upon the classic OSS Suppressors’ Flow-Through™ technology: the FLOW 556K mitigates gas in your face and reduces back pressure. Shooting suppressed with the FLOW 556 means you’ll have more time to shoot, with less time tuning your rifle. What makes a great lightweight 556 suppressor?  Made of 17-4 Stainless, the HUXWRX FLOW 556K weights just 11.8 oz and measures a scant 5.5 inches, making it easily manuervable on your host. HUXWRX created this can to withstand the rigors of US Government testing: the DLMS printed, 17-4 stainless steel construction has achieved a full auto rating that will withstand intense shooting, even on short barreled platforms.

With the FLOW 556K on your your rifle, you’ll have a minimal point of impact shift with the engineered helical cores and cones and the patented mounting Torque Lock System. Using left-hand threads, this 556 suppressor will tighten with every shot. The Torque Lock System aligns using a taper and the Flow-Through™ technology helps seal the can against the QD mounting surface: meaning no carbon will get into the threads. The HUXWRX FLOW 556K FH (Flash Hider) kit includes a flash hider muzzle device, so you’ll be ready to hit the range right out of the box.

The FLOW 556K is also versatile: optimized as a 5.56 suppressor it can also shine on other firearms and cartridges outside of 5.56/.223. The FLOW 556K is rated for 5.7×28, 17HMR, and other .22 and smaller centerfire rounds. Operate your HUXWRX suppressor confidently, knowing they will repair/replace, at no charge, suppressors made by HUXWRX Safety Co. and OSS Suppressors deemed to have manufacturer defects.

HUXWRX and OSS suppressors have been heralded by Silencer Shop customers as a “quality build” “everything you hope and expect” “extremely efficient” and the HUXWRX FLOW 556 is the new addition from this lauded manufacturer.


  • Weight: 11.8 oz
  • Length: 5.5”
  • Diameter: 1.6”
  • Materials: 17-4 Stainless Steel
  • Finish/Color: C-Series Cerakote Matte Black or FDE
  • Attachment: QD


  • FLOW 556K Suppressor
  • Flash Hider-QD 556