Irregular Design Group Hesychia SIXK 6mm 5.56 Hesion Bow Hybrid Flash Hider 1/2x28 Inconel 718 Armor Black Suppressor

Hesychia SIXK Suppressor6mm / 5.56 A Hesion Bow Mount A 1/2x28 Hybrid Flash Hider A Monolithic Inconel 718 A Extreme Low Backpressure A Full-Auto Rated A Armor Black A NFA The Hesychia SIXK is a monolithic Inconel 718 suppressor for 6mm and 5.56 calibers built around the Hesion Bow dual-locking mount system. This listing includes the 1/2x28 Hybrid Flash Hider bundle. Armor Black Cerakote finish. Laser Powder Bed Fusion (LPBF) construction enables complex internal geometry-radial diamond initial chamber, early annular intakes, captured helix paths, shielded ports, and monolithic flexure pawls-all printed as a single sealed unit with critical interfaces machined afterward. No user-serviceable internal components. 15.5 oz. 5.72" OAL. Full-auto rated for 10.3" barrels and above. No host tuning required. UPC: 850078995094. NFA item. MSRP: $1,195 (suppressor) + $40 bundle savings on HFH.Hesion Bow Dual-Locking MountThe Hesion Bow is the SIXK's primary interface system. Primary lock is a 15-degree taper over 0.25" of length combined with a 1-1/8"-8 left-hand American Buttress Thread-15 ft./lbs. of torque generates over 1,700 lbs. of sealing force. Less than 2.5 rotations to full taper lock. Six flexure pawls printed into the suppressor body engage 32 grooves on the outer edge of the muzzle device as a secondary redundant retention system. The Hesion Bow locking system adds only 0.5 oz. to the overall system weight.1/2x28 Hybrid Flash Hider - IncludedHybrid Flash Hider (HFH) on 1/2x28 threads included with this bundle. The HFH is the appropriate muzzle device for hosts that will spend meaningful time both suppressed and unsuppressed-provides stronger unsuppressed flash management and better host behavior when the suppressor is removed compared to Flow Enhancer options.Extreme Low Backpressure Gas ManagementGas enters a radial diamond structure in the initial chamber, gets disrupted and cooled, then routes into annular pathways before reaching the first blast baffle. The goal is immediate pressure distribution across the suppressor rather than a pressure event at the blast baffle. The result is host cycling behavior closer to the unsuppressed baseline without requiring adjustable gas blocks, heavier buffers, or spring changes.Monolithic Inconel 718 - LPBF ConstructionInconel 718 provides dimensional stability, erosion resistance, and thermal cycling durability under hard use with 6mm ARC and 5.56. LPBF (Laser Powder Bed Fusion) 3D printing enables internal geometry-annular intakes, helix paths, shielded ports, and integral pawls-that cannot be produced through conventional machining. The blast baffle zone receives dedicated hardening treatment against premature erosion. Fully sealed monolithic unit-no baffles to remove, no user-serviceable internals.Full-Auto Rated / No Host Tuning RequiredFull-auto rated for 10.3" barrels and above. Minimum recommended barrel length is 10.3" for 5.56 and 6mm-shorter barrels increase blast baffle erosion and raise projectile stability risk. Designed to mount and function without host modification required on any compatible firearm.Installation NotesInstall HFH to barrel at 30 ft./lbs.-timing not required, threadlocker not normally required. Cycle the mount 5-7 times on a new system during break-in. A slight rear gap when mounted confirms proper taper seating. Always use an alignment rod before first firing. Clean taper and mating surfaces before each mount to ensure proper seating.Armor Black CerakoteArmor Black Cerakote applied over monolithic Inconel 718 body.Sealed Monolithic UnitNo user-serviceable internal components. No baffles to remove individually. Maintenance consists of correct setup, clean interface, and proper taper seating.NFA ItemNFA-regulated item. Requires completion of NFA tax stamp process and transfer through licensed Class III FFL dealer. The Hesychia SIXK delivers extreme low backpressure 6mm/5.56 suppressor performance-monolithic Inconel 718 with Hesion Bow dual-lock and 1/2x28 HFH in Armor Black for no-tuning-required host compatibility.Specifications:Manufacturer: Hesychia / IDGModel: SIXKCaliber: 6mm / 5.56Material: Inconel 718Manufacturing: Laser Powder Bed Fusion (LPBF)Construction: Monolithic (Sealed)Mount: Hesion Bow (15-Degree Taper + 1-1/8"-8 LH American Buttress Thread)Secondary Lock: Integral Flexure Pawls (6) / 32-Groove Muzzle DeviceMuzzle Device Included: Hybrid Flash Hider, 1/2x28Gas Profile: Extreme Low BackpressureOverall Length: 5.72 inchesWeight: 15.5 ozFull-Auto Rated: Yes (10.3" barrel minimum)Minimum Barrel Length: 10.3 inchesFinish: Armor Black Cerakote