$1,350.00

Irregular Defense Hesychia SIXK

  • Phone Number: 8016664692
  • Condition: New
  • Listing Type: Business
  • City: Salt Lake City
  • State: Utah
  • Zip/Postal Code: 84103
  • Local County (e.g., Summit County): Salt Lake County
  • Make/Brand: Irregular Defense
  • Model: Hesychia SIXK
  • Caliber: 6mm
  • Terms: Must agree to terms
  • Listed: October 14, 2026 3:49 pm
  • Expires: 59 days, 20 hours

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Description

Hesychia SIXK

4473 transfers on all suppressors SBR’s and SBS’s. Schedule an appointment to check it out in person at our Salt Lake City location.

Color options: Black, ODG, FDE and RAW!

The Hesychia SIXK bundle includes Irregular Design Group’s new Hesychia SIXK 5.56mm/6ARC suppressor and the HFH (Hybrid Flash Hider) threaded in 1/2″x28TPI, everything you need to get started. Additional HFH’s are available for sale in either 1/2″x28TPI or 5/8″x24TPI for mounting to additional platforms.

Designed by USSOF veterans, the Hesychia SIXK suppressor optimizes performance in the compact, under-six-inch category for 5.56mm NATO and 6mm ARC supersonic rounds. Through innovative gas management, monolithic Inconel 718 construction, and the patented Hesion Bow mounting system, it delivers effective sound and flash suppression, durability, and ease of use.

Specifications

The Hesychia SIXK is a compact, lightweight suppressor designed for versatility and durability in demanding environments.

  • Caliber Rating: 6mm ARC, 5.56mm NATO
  • Overall Suppressor Length: 5.72” / 145mm
  • Muzzle Device Length: 2.125” / 54mm
  • Length Added: 3.625” / 92mm with suppressor installed; muzzle device adds 1.5” / 38mm to barrel. The entire assembly adds 5.125” / 130mm length to the end of a barrel
  • Diameter: 1.65” / 42mm
  • Weight: 15.5 ounces / 440 grams (suppressor), 3 ounces / 85 grams (muzzle device).
  • Material: Inconel 718.
  • Construction: Laser powder bed fusion (LPBF) and Machine Finished
  • Finish (Suppressor Only): High Temp Cerakote® or raw
  • Finish (Muzzle Device Only): Black PVD
  • Mount: 1.125”-8 left-hand American Buttress Thread (patent-pending), Hesion Bow (patent-pending)
  • Barrel Restrictions: None
  • Full Auto Rated: Yes
  • Internal Taper Angle: 15 degrees
  • Decibel Reduction Average (At ear): -30 db +/- depending on ammo and host weapon
  • Decibel Reduction Average (1m Left): -25 db +/- depending on ammo and host weapon

  

Listing ID: 9946acff8942fe3b