Irregular Design GroupHybrid Flash Hider MD (1/2x28)
Muzzle Device · attaches to 1/2x28 · presents IDG Hesion Bow · fits 599 suppressors in the catalog
length
2.27″
weight
2.6 oz
thread
1/2x28
+1 more thread pitch
material
Inconel 718
standard
IDG Hesion Bow
MSRP
$195
A barrel adapter screws onto your rifle's threaded muzzle and stays there. It gives the muzzle a mounting interface, so the suppressor attaches to the adapter instead of the bare barrel threads. One adapter per rifle lets you move one suppressor between them. Many are quick-detach designs, and some also work as a muzzle brake or flash hider.
This one fits barrels threaded 1/2x28 and presents the IDG Hesion Bow interface. A suppressor with a matching IDG Hesion Bow mount attaches to it. It comes in 2 thread pitches, so pick the one that matches your barrel.
How mounting systems work →- Type
- Muzzle Device
- Overall length
- 2.27″
- Added length
- 1.5″
- Weight
- 2.6 oz
- Material
- Inconel 718
- Attaches to
- 1/2x28
- Presents
- IDG Hesion Bow
- MSRP
- $195
Prices are manufacturer's suggested retail (MSRP). What you pay may differ.
599 suppressors in the catalog take this part, across 92 manufacturers including AAC, AB Suppressor, Abel Co. You aren't locked into one manufacturer's suppressors.
- Irregular Design Group Hesychia 556UK
- AAC 300-SD
- AB Suppressor A-10 5.56
- …and 596 more.
Which ones fit your barrel and host?
See all 599 in the Builder- 1/2x28
- 5/8x24
Irregular Design Group sells this part in 2 thread pitches. They are one product on this page; pick the pitch that matches your barrel in the Builder.
- The mount is the Hesion Bow system, U.S. No. 12460889.
- First to market with a sub-$200 3D printed Inconel 718 muzzle device intended as a suppressor host.
- The Hybrid Flash Hider is a reduced-flash, non-timed compensator. The external diamond geometry is patterned to match right-hand gas rotation and vector gas into the suppressor's annular intake, so it behaves more like a brake than its silhouette first suggests.
- Overall length 2.275", diameter 1.25", adding 1.5" to the barrel at 2.6 oz.
- The collar is pre-drilled for pin-and-weld use cases.
- The Hybrid Flash Hider is built around a 15-degree included taper and a 1.125-8 American buttress thread. The ridged base ring provides the locking indexes for the Hesion Bow pawls.
- The Hybrid Flash Hider uses Inconel 718 so the muzzle device, suppressor body, and Hesion Bow HUB adapter share the same thermal behavior. When dissimilar alloys are mixed, such as a 17-4 muzzle device driving into an Inconel 718 taper, the faster-growing component can wedge itself into the mating taper, gall the surface, and make the suppressor feel thermally locked once everything cools.
- The Hybrid Flash Hider uses a coarse 1.125-8 American buttress thread, a profile originally developed for hostile, dirty applications like tank barrels and artillery breech interfaces. The intentionally blunted crest increases impact and galling resistance and leaves a relief path for gas, keeping carbon from compacting in the threads the way it does on fine-pitch, sharp-crested thread systems.
- Use the HFH when the rifle will spend meaningful time both suppressed and unsuppressed. It is the more balanced choice for a mixed-use host, with stronger unsuppressed flash outcome and host behavior that makes more sense when the can comes off.
- On HUB suppressors like the SIXK-H and 556UK-H, the HFH is still the correct muzzle device but it has to live under the Hesion Bow HUB Adapter.
- Compatible suppressors are the Hesychia SIXK, Hesychia SIXK-H and Hesychia 556UK-H.
- The Hybrid Flash Hider installs with a 3/4" socket and does not require timing, at 30 ft-lbs of torque to the barrel.
- 1/2-28 HFH devices are intended for 5.56 hosts only and should not be used on 6MM barrels.