Irregular Design Group Hesychia 5.56 NATO/6 ARC HFH Muzzle Device

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. 

Specifications

• Caliber Rating: 6mm ARC, 5.56 NATO
• Overall Length: 2.125"
• Length Added to Muzzle: 1.5"
• Diameter: 1.25"
• Weight: 3oz
• 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)
• Internal Taper Angle: 15 degrees included