Kgm Suppressors A-Qd-Fh-S-1 Qd Flash Hider Nitride Steel 1/2"X28 Threads
The KGM Suppressors A-QD-FH-S-1 QD Flash Hider is a quick-detach muzzle device built to pair with KGM's R556 and R30 suppressor platforms on rifles threaded for 1/2x28. If you're running a Modern Sporting Rifle or centerfire rifle with that thread pitch and want repeatable suppressor mounting without tools, this flash hider gives you the QD interface you need—plus a birdcage-style design that helps control flash signature downrange.
Built from heat-treated chromoly steel and finished with a durable OXyN gas nitride coating, this muzzle device handles the thermal cycling that comes with suppressed shooting. The taper-lock mounting surface and secondary ratcheting retention system work together to keep your suppressor in place shot after shot, eliminating the minute-of-angle shift that can plague lesser QD systems.
Installation is straightforward on any rifle with 1/2x28 threads. The compact profile won't bloat your barrel profile or interfere with typical handguards, making it practical for hunting, range work, and precision shooting where suppressor versatility matters. If you already own a KGM R556, R556A1, R556A2, R30A1, or R30A2 suppressor, this flash hider is the mount you need to unlock quick-change capability.
Key Features
- Quick-detach interface for KGM R556 and R30 suppressor family
- Birdcage flash hider design helps control muzzle flash
- Heat-treated chromoly steel construction with OXyN nitride finish for durability and corrosion resistance
- Taper-lock mounting surface with secondary ratcheting retention for repeatable zero
- Fits 1/2x28 threaded barrels
Specifications
| Thread Pitch | 1/2x28 |
| Material | Heat-treated chromoly steel |
| Finish | OXyN gas nitride |
| Style | Birdcage flash hider with quick-detach mount |
| Compatible Suppressors | R556, R556A1, R556A2, R30A1, R30A2 |
Frequently Asked Questions
What suppressors does this flash hider work with?
The KGM A-QD-FH-S-1 is compatible with KGM's R556, R556A1, R556A2, R30A1, and R30A2 suppressors. It will not work with suppressors from other manufacturers.
Will this fit my rifle's muzzle threads?
This flash hider is threaded for 1/2x28. If your rifle's barrel is cut to that specification, it will thread on. Common calibers with 1/2x28 include 5.56 NATO and some centerfire rifle cartridges, but verify your barrel's thread pitch before purchase.
Does it come with the suppressor?
No. The A-QD-FH-S-1 is the quick-detach flash hider mount only. You'll need to purchase a compatible KGM suppressor separately if you don't already own one.
How does the retention system work?
The flash hider features a taper-lock mounting surface paired with a ratcheting secondary retention mechanism. This two-stage design ensures your suppressor stays secure and returns to zero when you remove and reattach it.

