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HESYCHIA HFH

$195 | LIMITED PRESALE 04APR2025 0900PST

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CALIBER RATING
6MM ARC, 5.56MM NATO
OVERALL LENGTH 
2.125"
LENGTH ADDED TO BARREL
1.5"
DIAMETER
1.25"
WEIGHT
3 oz. *
MATERIAL
HEAT TREATED - INCONEL 718
CONSTRUCTION
LPBF
FINISH
Physical Vapor Deposition (PVD)
MOUNT
1.125" - 8 AMERICAN BUTTRESS THREAD (PATENT PENDING)

HESION BOW (PATENT PENDING)

TAPER ANGLE
15 DEGREES INCLUDED

Overview

HESYCHIA Hybrid Flash Hider


Hesion Bow (Patent Pending) Locking System


Additively manufactured from Inconel 718, this hybrid flash hider mates seamlessly with the HESYCHIA SIX Series. Secures with over 1,700 lbs. of sealing force via a 15-degree taper and 1 1/8” - 8 left-hand American Buttress Thread (Patent Pending) —locks tight with just 15 ft-lbs. of torque in under 2.5 turns. Integrates with six flexure pawls in the suppressor for precise alignment and rock-solid hold, no extra parts to fail. Matching Inconel construction and robust thread design resist thermal locking for reliable performance.


Hybrid Flash-Recoil Core


Engineered for balance, this design reduces flash and softens recoil. A helical structure with diamond-shaped ports and subtle baffles disperses gas smoothly, shrinking muzzle signature and disturbance range over traditional hiders. Delivers noticeable recoil reduction standalone, yet shines suppressed—vectoring gas to the SIXK’s blast chamber walls for controlled, steady shooting. 



CLEANING SCHEDULE

Cleaning and Care: Hesychia SIXK Suppressor and Hybrid Flash Hider


To ensure optimal performance and longevity of the Hesychia SIXK and Hybrid Flash Hider, proper maintenance of the taper interface is essential. Tapers function best when free of debris, excessive carbon, or other contaminants. If carbon buildup is observed on the taper face while shooting suppressed, verify that the suppressor is being tightened onto the muzzle device with sufficient force. Applying 15 ft-lbs. of torque generates 1,700 ft-lbs. of mating force on the taper—more than enough for a secure lock without risking material deformation or sticking under typical hand-tightening conditions.


Clean tapered surfaces are critical for this level of torque conversion. Any residue, such as baked-on carbon deposits or dirt, left on the taper faces during tightening can damage or deform the interface. Repeatedly mounting the suppressor onto a dirty muzzle device may reduce the sealing effectiveness of the taper over time. While this does not directly impact the suppressor’s performance, it increases the risk of carbon lock. The American Buttress Thread’s design, with its permissive tolerances and spacing, helps minimize carbon buildup to prevent locking, but proper care remains important. If a firing schedule or cleaning routine leads to carbon lock, thoroughly clean the tapers and threads to restore the system to normal operating conditions.

* = Still in prototype phase, final values will be published once we hit design lock. These numbers are slightly on the high side to be safe.

GRANTS PASS, OR

LANCASTER, OH

ADVANCED WEAPON SYSTEM DESIGN AND MANUFACTURING

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MADE IN USA

CONTACT US

info@irregulardesigngroup.com
© IRREGULAR DESIGN GROUP 2025